diff --git a/src/newgrf_house.cpp b/src/newgrf_house.cpp
index e37d7ec4eb..d51c5b25a9 100644
--- a/src/newgrf_house.cpp
+++ b/src/newgrf_house.cpp
@@ -103,6 +103,7 @@ void ResetHouses()
  * @param not_yet_constructed House is still under construction.
  * @param initial_random_bits Random bits during construction checks.
  * @param watched_cargo_triggers Cargo types that triggered the watched cargo callback.
+ * @param view The house's 'view'.
  */
 HouseResolverObject::HouseResolverObject(HouseID house_id, TileIndex tile, Town *town,
 		CallbackID callback, uint32_t param1, uint32_t param2,
diff --git a/src/newgrf_house.h b/src/newgrf_house.h
index c8edad4d09..d02f750c62 100644
--- a/src/newgrf_house.h
+++ b/src/newgrf_house.h
@@ -35,6 +35,7 @@ struct HouseScopeResolver : public ScopeResolver {
 	 * @param not_yet_constructed House is still under construction.
 	 * @param initial_random_bits Random bits during construction checks.
 	 * @param watched_cargo_triggers Cargo types that triggered the watched cargo callback.
+	 * @param view The house's 'view'.
 	 */
 	HouseScopeResolver(ResolverObject &ro, HouseID house_id, TileIndex tile, Town *town,
 			bool not_yet_constructed, uint8_t initial_random_bits, CargoTypes watched_cargo_triggers, int view)
diff --git a/src/newgrf_industries.cpp b/src/newgrf_industries.cpp
index 42d9c8a882..f668d172fb 100644
--- a/src/newgrf_industries.cpp
+++ b/src/newgrf_industries.cpp
@@ -571,6 +571,7 @@ CommandCost CheckIfCallBackAllowsCreation(TileIndex tile, IndustryType type, siz
  * Check with callback #CBID_INDUSTRY_PROBABILITY whether the industry can be built.
  * @param type Industry type to check.
  * @param creation_type Reason to construct a new industry.
+ * @param default_prob The default probability if the NewGRF doesn't override it.
  * @return If the industry has no callback or allows building, \c true is returned. Otherwise, \c false is returned.
  */
 uint32_t GetIndustryProbabilityCallback(IndustryType type, IndustryAvailabilityCallType creation_type, uint32_t default_prob)
diff --git a/src/newgrf_object.cpp b/src/newgrf_object.cpp
index 89256ae132..a77bb28042 100644
--- a/src/newgrf_object.cpp
+++ b/src/newgrf_object.cpp
@@ -377,6 +377,7 @@ unhandled:
 /**
  * Constructor of the object resolver.
  * @param obj Object being resolved.
+ * @param spec Specifiction of the object's type.
  * @param tile %Tile of the object.
  * @param view View of the object.
  * @param callback Callback ID.
diff --git a/src/newgrf_object.h b/src/newgrf_object.h
index fc39c9e4ba..7b291701a4 100644
--- a/src/newgrf_object.h
+++ b/src/newgrf_object.h
@@ -118,6 +118,7 @@ struct ObjectScopeResolver : public ScopeResolver {
 	 * Constructor of an object scope resolver.
 	 * @param ro Surrounding resolver.
 	 * @param obj Object being resolved.
+	 * @param spec The specification of the object type.
 	 * @param tile %Tile of the object.
 	 * @param view View of the object.
 	 */
diff --git a/src/newgrf_railtype.h b/src/newgrf_railtype.h
index 562b7529c0..2f00e44e83 100644
--- a/src/newgrf_railtype.h
+++ b/src/newgrf_railtype.h
@@ -23,6 +23,7 @@ struct RailTypeScopeResolver : public ScopeResolver {
 	/**
 	 * Constructor of the railtype scope resolvers.
 	 * @param ro Surrounding resolver.
+	 * @param rti Specification of the rail type.
 	 * @param tile %Tile containing the track. For track on a bridge this is the southern bridgehead.
 	 * @param context Are we resolving sprites for the upper halftile, or on a bridge?
 	 */
diff --git a/src/newgrf_roadstop.cpp b/src/newgrf_roadstop.cpp
index 2646ef9209..9b7a20b1dc 100644
--- a/src/newgrf_roadstop.cpp
+++ b/src/newgrf_roadstop.cpp
@@ -276,6 +276,8 @@ uint16_t GetRoadStopCallback(CallbackID callback, uint32_t param1, uint32_t para
  * @param y position y of image.
  * @param roadtype the RoadType of the underlying road.
  * @param spec the RoadStop's spec.
+ * @param type The type of station.
+ * @param view The road stop's view.
  * @return true of the tile was drawn (allows for fallback to default graphics)
  */
 void DrawRoadStopTile(int x, int y, RoadType roadtype, const RoadStopSpec *spec, StationType type, int view)
diff --git a/src/newgrf_roadtype.cpp b/src/newgrf_roadtype.cpp
index 3500407193..7211a1381f 100644
--- a/src/newgrf_roadtype.cpp
+++ b/src/newgrf_roadtype.cpp
@@ -142,7 +142,7 @@ RoadTypeResolverObject::RoadTypeResolverObject(const RoadTypeInfo *rti, TileInde
  * @param rti The road type data (spec).
  * @param tile The tile to get the sprite for.
  * @param rtsg The type of sprite to draw.
- * @param content Where are we drawing the tile?
+ * @param context Where are we drawing the tile?
  * @param [out] num_results If not nullptr, return the number of sprites in the spriteset.
  * @return The sprite to draw.
  */
diff --git a/src/newgrf_sound.cpp b/src/newgrf_sound.cpp
index ef8b75f30f..488fc0b843 100644
--- a/src/newgrf_sound.cpp
+++ b/src/newgrf_sound.cpp
@@ -78,6 +78,7 @@ size_t GetSoundPoolAllocatedMemory()
 /**
  * Extract meta data from a NewGRF sound.
  * @param sound Sound to load.
+ * @param sound_id Identifier of the sound to load.
  * @return True if a valid sound was loaded.
  */
 bool LoadNewGRFSound(SoundEntry &sound, SoundID sound_id)
diff --git a/src/newgrf_spritegroup.h b/src/newgrf_spritegroup.h
index 5da16e1152..95486aa78f 100644
--- a/src/newgrf_spritegroup.h
+++ b/src/newgrf_spritegroup.h
@@ -68,7 +68,7 @@ struct SpecializedSpriteGroup : public SpriteGroup {
 
 	/**
 	 * Creates a new T-object in the SpriteGroup pool.
-	 * @param args... The arguments to the constructor.
+	 * @param args The arguments to the constructor.
 	 * @return The created object.
 	 */
 	template <typename... Targs>
@@ -221,6 +221,7 @@ protected:
 struct CallbackResultSpriteGroup : SpecializedSpriteGroup<CallbackResultSpriteGroup> {
 	/**
 	 * Creates a spritegroup representing a callback result
+	 * @param index Unique (pool) identifier of the SpriteGroup.
 	 * @param value The value that was used to represent this callback result
 	 */
 	CallbackResultSpriteGroup(SpriteGroupID index, CallbackResult value) : SpecializedSpriteGroup<CallbackResultSpriteGroup>(index), result(value) {}
@@ -237,6 +238,7 @@ protected:
 struct ResultSpriteGroup : SpecializedSpriteGroup<ResultSpriteGroup> {
 	/**
 	 * Creates a spritegroup representing a sprite number result.
+	 * @param index Unique (pool) identifier of the SpriteGroup.
 	 * @param sprite The sprite number.
 	 * @param num_sprites The number of sprites per set.
 	 * @return A spritegroup representing the sprite number result.
diff --git a/src/openttd.cpp b/src/openttd.cpp
index 2a19d81df4..38ce81921f 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -934,6 +934,7 @@ static void MakeNewEditorWorld()
  * a previous correct state. In the menu for example load the intro game again.
  * @param filename file to be loaded
  * @param fop mode of loading, always SLO_LOAD
+ * @param dft Type of file that is going to be loaded.
  * @param newgm switch to this mode of loading fails due to some unknown error
  * @param subdir default directory to look for filename, set to 0 if not needed
  * @param lf Load filter to use, if nullptr: use filename + subdir.
diff --git a/src/order_base.h b/src/order_base.h
index d2d06e778b..e3e3480d7b 100644
--- a/src/order_base.h
+++ b/src/order_base.h
@@ -293,9 +293,9 @@ public:
 	OrderList(OrderListID index) : OrderListPool::PoolItem<&_orderlist_pool>(index) {}
 
 	/**
-	 * Create an order list with the given order chain for the given vehicle.
+	 * Create an order list with the order for the given vehicle.
 	 * @param index index of the list within the order list pool
-	 * @param chain pointer to the first order of the order chain
+	 * @param order Rvalue reference to the order.
 	 * @param v any vehicle using this orderlist
 	 */
 	OrderList(OrderListID index, Order &&order, Vehicle *v) : OrderListPool::PoolItem<&_orderlist_pool>(index)
@@ -357,7 +357,7 @@ public:
 	/**
 	 * Get the order after the given one or the first one, if the given one is the
 	 * last one.
-	 * @param curr Order to find the next one for.
+	 * @param cur Order to find the next one for.
 	 * @return Next order.
 	 */
 	inline VehicleOrderID GetNext(VehicleOrderID cur) const
diff --git a/src/order_cmd.cpp b/src/order_cmd.cpp
index e380384ba3..251fd4c3b4 100644
--- a/src/order_cmd.cpp
+++ b/src/order_cmd.cpp
@@ -352,6 +352,7 @@ VehicleOrderID OrderList::GetNextDecisionNode(VehicleOrderID next, uint hops) co
 
 /**
  * Recursively determine the next deterministic station to stop at.
+ * @param next_station The next stations that we have already seen, and might be adding to.
  * @param v The vehicle we're looking at.
  * @param first Order to start searching at or INVALID_VEH_ORDER_ID to start at cur_implicit_order_index + 1.
  * @param hops Number of orders we have already looked at.
@@ -410,7 +411,7 @@ void OrderList::GetNextStoppingStation(std::vector<StationID> &next_station, con
 
 /**
  * Insert a new order into the order chain.
- * @param new_order is the order to insert into the chain.
+ * @param order Rvalue reference of the order to insert into the chain.
  * @param index is the position where the order is supposed to be inserted.
  */
 void OrderList::InsertOrderAt(Order &&order, VehicleOrderID index)
diff --git a/src/os/macosx/font_osx.cpp b/src/os/macosx/font_osx.cpp
index 6bc7682942..0aa9b80778 100644
--- a/src/os/macosx/font_osx.cpp
+++ b/src/os/macosx/font_osx.cpp
@@ -205,6 +205,7 @@ public:
 	 * If a CoreText font description is present, e.g. from the automatic font
 	 * fallback search, use it. Otherwise, try to resolve it by font name.
 	 * @param fs The font size to load.
+	 * @param fonttype The type of font that is being loaded.
 	 */
 	std::unique_ptr<FontCache> LoadFont(FontSize fs, FontType fonttype) const override
 	{
diff --git a/src/os/windows/font_win32.cpp b/src/os/windows/font_win32.cpp
index 9f252eb266..35046b5654 100644
--- a/src/os/windows/font_win32.cpp
+++ b/src/os/windows/font_win32.cpp
@@ -270,11 +270,12 @@ public:
 	Win32FontCacheFactory() : FontCacheFactory("win32", "Win32 font loader") {}
 
 	/**
-	* Loads the GDI font.
-	* If a GDI font description is present, e.g. from the automatic font
-	* fallback search, use it. Otherwise, try to resolve it by font name.
-	* @param fs The font size to load.
-	*/
+	 * Loads the GDI font.
+	 * If a GDI font description is present, e.g. from the automatic font
+	 * fallback search, use it. Otherwise, try to resolve it by font name.
+	 * @param fs The font size to load.
+	 * @param fonttype The type of font that is being loaded.
+	 */
 	std::unique_ptr<FontCache> LoadFont(FontSize fs, FontType fonttype) const override
 	{
 		if (fonttype != FontType::TrueType) return nullptr;
diff --git a/src/palette.cpp b/src/palette.cpp
index c04f8c6e26..eba6a5378d 100644
--- a/src/palette.cpp
+++ b/src/palette.cpp
@@ -121,7 +121,7 @@ static uint8_t FindNearestColourIndex(uint8_t r, uint8_t g, uint8_t b)
 
 /**
  * Find nearest company colour palette index for a brightness level.
- * @param pixel Pixel to find.
+ * @param b Pixel-colour to find.
  * @returns palette index of nearest colour.
  */
 static uint8_t FindNearestColourReshadeIndex(uint8_t b)
diff --git a/src/pathfinder/water_regions.cpp b/src/pathfinder/water_regions.cpp
index a7f79cad55..991db3cee5 100644
--- a/src/pathfinder/water_regions.cpp
+++ b/src/pathfinder/water_regions.cpp
@@ -337,7 +337,7 @@ void InvalidateWaterRegion(TileIndex tile)
  * accessible from one particular side of the starting patch.
  * @param water_region_patch Water patch within the water region to start searching from
  * @param side Side of the water region to look for neighbouring patches of water
- * @param callback The function that will be called for each neighbour that is found
+ * @param func The function that will be called for each neighbour that is found
  */
 static inline void VisitAdjacentWaterRegionPatchNeighbours(const WaterRegionPatchDesc &water_region_patch, DiagDirection side, VisitWaterRegionPatchCallback &func)
 {
diff --git a/src/pathfinder/yapf/yapf.h b/src/pathfinder/yapf/yapf.h
index 62789f9fb2..d0a8660e76 100644
--- a/src/pathfinder/yapf/yapf.h
+++ b/src/pathfinder/yapf/yapf.h
@@ -22,6 +22,7 @@
  * @param v        the ship that needs to find a path
  * @param tile     the tile to find the path from (should be next tile the ship is about to enter)
  * @param path_found [out] Whether a path has been found (true) or has been guessed (false)
+ * @param path_cache Cache of a previously chosen path.
  * @return         the best trackdir for next turn or INVALID_TRACK if the path could not be found
  */
 Track YapfShipChooseTrack(const Ship *v, TileIndex tile, bool &path_found, ShipPathCache &path_cache);
@@ -41,6 +42,7 @@ bool YapfShipCheckReverse(const Ship *v, Trackdir *trackdir);
  * @param enterdir  diagonal direction which the RV will enter this new tile from
  * @param trackdirs available trackdirs on the new tile (to choose from)
  * @param path_found [out] Whether a path has been found (true) or has been guessed (false)
+ * @param path_cache Cache of a previously chosen path.
  * @return          the best trackdir for next turn or INVALID_TRACKDIR if the path could not be found
  */
 Trackdir YapfRoadVehicleChooseTrack(const RoadVehicle *v, TileIndex tile, DiagDirection enterdir, TrackdirBits trackdirs, bool &path_found, RoadVehPathCache &path_cache);
diff --git a/src/rail_cmd.cpp b/src/rail_cmd.cpp
index 0732e7097a..8e3ca1787b 100644
--- a/src/rail_cmd.cpp
+++ b/src/rail_cmd.cpp
@@ -1933,7 +1933,7 @@ static const FenceOffset _fence_offsets[] = {
 /**
  * Draw a track fence.
  * @param ti Tile drawing information.
- * @param base_image First fence sprite.
+ * @param psid First fence sprite and palette.
  * @param num_sprites Number of fence sprites.
  * @param rfo Fence to draw.
  */
@@ -1990,6 +1990,7 @@ static void DrawTrackFence_SW(const TileInfo *ti, const PalSpriteID &psid, uint
  * Draw track fences.
  * @param ti Tile drawing information.
  * @param rti Rail type information.
+ * @param pal The palette to apply while drawing.
  */
 static void DrawTrackDetails(const TileInfo *ti, const RailTypeInfo *rti, PaletteID pal)
 {
diff --git a/src/rail_gui.cpp b/src/rail_gui.cpp
index c457b16f9e..30e23d0b13 100644
--- a/src/rail_gui.cpp
+++ b/src/rail_gui.cpp
@@ -1498,6 +1498,7 @@ private:
 
 	/**
 	 * Draw dynamic a signal-sprite in a button in the signal GUI
+	 * @param r The rectangle to draw the sprite in.
 	 * @param image        the sprite to draw
 	 */
 	void DrawSignalSprite(const Rect &r, SpriteID image) const
diff --git a/src/road.cpp b/src/road.cpp
index 6b21e33b81..bd4b9ebf99 100644
--- a/src/road.cpp
+++ b/src/road.cpp
@@ -117,7 +117,7 @@ RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb)
 /**
  * Finds out, whether given company has a given RoadType available for construction.
  * @param company ID of company
- * @param roadtypet RoadType to test
+ * @param roadtype RoadType to test
  * @return true if company has the requested RoadType available
  */
 bool HasRoadTypeAvail(const CompanyID company, RoadType roadtype)
@@ -147,6 +147,7 @@ bool HasRoadTypeAvail(const CompanyID company, RoadType roadtype)
 /**
  * Test if any buildable RoadType is available for a company.
  * @param company the company in question
+ * @param rtt Whether to check for road or tram types.
  * @return true if company has any RoadTypes available
  */
 bool HasAnyRoadTypesAvail(CompanyID company, RoadTramType rtt)
diff --git a/src/road_cmd.cpp b/src/road_cmd.cpp
index ab1ad512bb..8af7b4ed21 100644
--- a/src/road_cmd.cpp
+++ b/src/road_cmd.cpp
@@ -244,7 +244,7 @@ static Foundation GetRoadFoundation(Slope tileh, RoadBits bits);
  * @param tile      the tile to remove the road from
  * @param remove    the roadbits that are going to be removed
  * @param owner     the actual owner of the roadbits of the tile
- * @param rt        the road type to remove the bits from
+ * @param rtt The road type to remove the bits from.
  * @param flags     command flags
  * @param town_check Shall the town rating checked/affected
  * @return A succeeded command when it is allowed to remove the road bits, a failed command otherwise.
@@ -308,7 +308,7 @@ CommandCost CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, Owner owner, R
  * @param tile tile where to remove road from
  * @param flags operation to perform
  * @param pieces roadbits to remove
- * @param rt roadtype to remove
+ * @param rtt Road type to remove.
  * @param town_check should we check if the town allows removal?
  */
 static CommandCost RemoveRoad(TileIndex tile, DoCommandFlags flags, RoadBits pieces, RoadTramType rtt, bool town_check)
@@ -1496,6 +1496,7 @@ static void DrawRoadDetail(SpriteID img, const TileInfo *ti, int8_t dx, int8_t d
 /**
  * Draw road underlay and overlay sprites.
  * @param ti TileInfo
+ * @param pal The palette to apply to the overlays.
  * @param road_rti Road road type information
  * @param tram_rti Tram road type information
  * @param road_offset Road sprite offset (based on road bits)
@@ -2455,6 +2456,7 @@ static void ConvertRoadTypeOwner(TileIndex tile, uint num_pieces, Owner owner, R
  * @param tile end tile of road conversion drag
  * @param area_start start tile of drag
  * @param to_type new roadtype to convert to.
+ * @param diagonal Whether a diagonal or orthogonal area is to be converted.
  * @return the cost of this operation or an error
  */
 CommandCost CmdConvertRoad(DoCommandFlags flags, TileIndex tile, TileIndex area_start, RoadType to_type, bool diagonal)
diff --git a/src/road_cmd.h b/src/road_cmd.h
index 4b0cfcd4d6..12a069be2c 100644
--- a/src/road_cmd.h
+++ b/src/road_cmd.h
@@ -36,6 +36,6 @@ DEF_CMD_TRAIT(Commands::ConvertRoad, CmdConvertRoad, {}, CommandType::LandscapeC
 CommandCallback CcPlaySound_CONSTRUCTION_OTHER;
 CommandCallback CcBuildRoadTunnel;
 void CcRoadDepot(Commands cmd, const CommandCost &result, TileIndex tile, RoadType rt, DiagDirection dir);
-void CcRoadStop(Commands cmd, const CommandCost &result, TileIndex tile, uint8_t width, uint8_t length, RoadStopType, bool is_drive_through, DiagDirection dir, RoadType, RoadStopClassID spec_class, uint16_t spec_index, StationID, bool);
+void CcRoadStop(Commands, const CommandCost &result, TileIndex tile, uint8_t width, uint8_t length, RoadStopType, bool is_drive_through, DiagDirection dir, RoadType, RoadStopClassID spec_class, uint16_t spec_index, StationID, bool);
 
 #endif /* ROAD_CMD_H */
diff --git a/src/road_gui.cpp b/src/road_gui.cpp
index 247ce30c6e..5b3c40eefc 100644
--- a/src/road_gui.cpp
+++ b/src/road_gui.cpp
@@ -121,6 +121,7 @@ void CcPlaySound_CONSTRUCTION_OTHER(Commands, const CommandCost &result, TileInd
 /**
  * Callback to start placing a bridge.
  * @param tile Start tile of the bridge.
+ * @param w The window to call back to when overbuilding a bridge.
  */
 static void PlaceRoad_Bridge(TileIndex tile, Window *w)
 {
@@ -878,6 +879,7 @@ struct BuildRoadToolbarWindow : Window {
 	 * Handler for global hotkeys of the BuildRoadToolbarWindow.
 	 * @param hotkey Hotkey
 	 * @param last_build Last build road type
+	 * @param rtt The road/tram type.
 	 * @return ES_HANDLED if hotkey was accepted.
 	 */
 	static EventState RoadTramToolbarGlobalHotkeys(int hotkey, RoadType last_build, RoadTramType rtt)
diff --git a/src/road_map.cpp b/src/road_map.cpp
index 90b7ce54fa..9c337aa74d 100644
--- a/src/road_map.cpp
+++ b/src/road_map.cpp
@@ -47,7 +47,7 @@ bool MayHaveRoad(Tile t)
  * for bridge ramps and tunnel entrances is returned depending
  * on the orientation of the tunnel or bridge.
  * @param tile the tile to get the road bits for
- * @param rt   the road type to get the road bits form
+ * @param rtt the road type to get the road bits form
  * @param straight_tunnel_bridge_entrance whether to return straight road bits for tunnels/bridges.
  * @return the road bits of the given tile
  */
diff --git a/src/road_map.h b/src/road_map.h
index f493628269..60aad49277 100644
--- a/src/road_map.h
+++ b/src/road_map.h
@@ -105,7 +105,7 @@ inline bool IsLevelCrossingTile(Tile t)
 /**
  * Get the present road bits for a specific road type.
  * @param t  The tile to query.
- * @param rt Road type.
+ * @param rtt Road type.
  * @pre IsNormalRoad(t)
  * @return The present road bits for the road type.
  */
@@ -131,7 +131,7 @@ inline RoadBits GetAllRoadBits(Tile tile)
  * Set the present road bits for a specific road type.
  * @param t  The tile to change.
  * @param r  The new road bits.
- * @param rt Road type.
+ * @param rtt Road type.
  * @pre IsNormalRoad(t)
  */
 inline void SetRoadBits(Tile t, RoadBits r, RoadTramType rtt)
@@ -189,7 +189,7 @@ inline bool HasRoadTypeTram(Tile t)
 /**
  * Check if a tile has a road or a tram road type.
  * @param t  The tile to check.
- * @param tram True to check tram, false to check road.
+ * @param rtt The road type.
  * @return True if the tile has the specified road type.
  */
 inline bool HasTileRoadType(Tile t, RoadTramType rtt)
@@ -244,7 +244,7 @@ inline void SetRoadOwner(Tile t, RoadTramType rtt, Owner o)
 /**
  * Check if a specific road type is owned by an owner.
  * @param t  The tile to query.
- * @param tram True to check tram, false to check road.
+ * @param rtt Road type to check.
  * @param o  Owner to compare with.
  * @pre HasTileRoadType(t, rt)
  * @return True if the road type is owned by the given owner.
@@ -269,7 +269,7 @@ inline bool HasTownOwnedRoad(Tile t)
 /**
  * Checks if a DisallowedRoadDirections is valid.
  *
- * @param wc The value to check
+ * @param drt The value to check
  * @return true if the given value is a valid DisallowedRoadDirections.
  */
 inline bool IsValidDisallowedRoadDirections(DisallowedRoadDirections drt)
diff --git a/src/saveload/saveload.cpp b/src/saveload/saveload.cpp
index aecdad4685..65843b29bf 100644
--- a/src/saveload/saveload.cpp
+++ b/src/saveload/saveload.cpp
@@ -929,6 +929,7 @@ static inline size_t SlCalcStdStringLen(const void *ptr)
  * because the validation looks for SCC_ENCODED. If there is something invalid,
  * just bail out and do not continue trying to replace the tokens.
  * @param str the string to fix.
+ * @param fix_code Whether to interpret/replace codes 0xE028 and 0xE02A as/with SCC_ENCODED.
  */
 void FixSCCEncoded(std::string &str, bool fix_code)
 {
@@ -1812,7 +1813,7 @@ static bool SlObjectMember(void *object, const SaveLoad &sld)
 
 /**
  * Set the length of this list.
- * @param The length of the list.
+ * @param length The length of the list.
  */
 void SlSetStructListLength(size_t length)
 {
@@ -3251,6 +3252,7 @@ SaveOrLoadResult LoadWithFilter(std::shared_ptr<LoadFilter> reader)
  * handled. It opens the savegame, selects format and checks versions
  * @param filename The name of the savegame being created/loaded
  * @param fop Save or load mode. Load can also be a TTD(Patch) game.
+ * @param dft The type of file to save or load.
  * @param sb The sub directory to save the savegame in
  * @param threaded True when threaded saving is allowed
  * @return Return the result of the action. #SL_OK, #SL_ERROR, or #SL_REINIT ("unload" the game)
@@ -3430,8 +3432,8 @@ void FileToSaveLoad::SetMode(const FiosType &ft, SaveLoadOperation fop)
 }
 
 /**
- * Set the title of the file.
- * @param title Title of the file.
+ * Set the mode, title and name of the file.
+ * @param item Container with mode, title and name.
  */
 void FileToSaveLoad::Set(const FiosItem &item)
 {
diff --git a/src/saveload/saveload_error.hpp b/src/saveload/saveload_error.hpp
index ba5b9bd71d..938d5bbcc9 100644
--- a/src/saveload/saveload_error.hpp
+++ b/src/saveload/saveload_error.hpp
@@ -18,7 +18,7 @@
 
 /**
  * Issue an SlErrorCorrupt with a format string.
- * @param format_string The formatting string to tell what to do with the remaining arguments.
+ * @param format The formatting string to tell what to do with the remaining arguments.
  * @param fmt_args The arguments to be passed to fmt.
  * @tparam Args The types of the fmt arguments.
  * @note This function does never return as it throws an exception to
diff --git a/src/saveload/settings_sl.cpp b/src/saveload/settings_sl.cpp
index 7c5416dad7..72faa0ef98 100644
--- a/src/saveload/settings_sl.cpp
+++ b/src/saveload/settings_sl.cpp
@@ -101,6 +101,7 @@ static std::vector<SaveLoad> GetSettingsDesc(const SettingTable &settings, bool
  * @param settings SettingDesc struct containing all information
  * @param object can be either nullptr in which case we load global variables or
  * a pointer to a struct which is getting saved
+ * @param slct Savegame compatibility mapping table.
  */
 static void LoadSettings(const SettingTable &settings, void *object, const SaveLoadCompatTable &slct)
 {
diff --git a/src/script/script_gui.cpp b/src/script/script_gui.cpp
index d6e2aed82f..9d86a08e8b 100644
--- a/src/script/script_gui.cpp
+++ b/src/script/script_gui.cpp
@@ -625,6 +625,7 @@ struct ScriptTextfileWindow : public TextfileWindow {
 
 /**
  * Open the Script version of the textfile window.
+ * @param parent The window we become a child of, and for which other textfile windows are closed.
  * @param file_type The type of textfile to display.
  * @param slot The slot the Script is using.
  */
@@ -745,6 +746,7 @@ struct ScriptDebugWindow : public Window {
 	 * Constructor for the window.
 	 * @param desc The description of the window.
 	 * @param number The window number (actually unused).
+	 * @param show_company The initial company to focus on.
 	 */
 	ScriptDebugWindow(WindowDesc &desc, WindowNumber number, Owner show_company) : Window(desc), break_editbox(MAX_BREAK_STR_STRING_LENGTH)
 	{
@@ -970,7 +972,7 @@ struct ScriptDebugWindow : public Window {
 
 	/**
 	 * Change all settings to select another Script.
-	 * @param show_ai The new AI to show.
+	 * @param show_script The new script to show.
 	 * @param new_window Open the script in a new window.
 	 */
 	void ChangeToScript(CompanyID show_script, bool new_window = false)
diff --git a/src/script/script_scanner.cpp b/src/script/script_scanner.cpp
index 61ceba3323..ca092878f4 100644
--- a/src/script/script_scanner.cpp
+++ b/src/script/script_scanner.cpp
@@ -183,6 +183,7 @@ struct ScriptFileChecksumCreator : FileScanner {
  * @param ci The information to compare to.
  * @param md5sum Whether to check the MD5 checksum.
  * @param info The script to get the shortname and md5 sum from.
+ * @param dir The directory to look in for scripts.
  * @return True iff they're the same.
  */
 static bool IsSameScript(const ContentInfo &ci, bool md5sum, const ScriptInfo &info, Subdirectory dir)
diff --git a/src/settingentry_gui.cpp b/src/settingentry_gui.cpp
index d9ac6134b0..827748d2ee 100644
--- a/src/settingentry_gui.cpp
+++ b/src/settingentry_gui.cpp
@@ -257,14 +257,6 @@ const void *ResolveObject(const GameSettings *settings_ptr, const IntSettingDesc
 	return settings_ptr;
 }
 
-/**
- * Function to draw setting value (button + text + current value)
- * @param settings_ptr Pointer to current values of all settings
- * @param left         Left-most position in window/panel to start drawing
- * @param right        Right-most position in window/panel to draw
- * @param y            Upper-most position in window/panel to start drawing
- * @param highlight    Highlight entry.
- */
 void SettingEntry::DrawSetting(GameSettings *settings_ptr, int left, int right, int y, bool highlight) const
 {
 	const IntSettingDesc *sd = this->setting;
@@ -602,12 +594,6 @@ uint SettingsPage::Draw(GameSettings *settings_ptr, int left, int right, int y,
 	return cur_row;
 }
 
-/**
- * Function to draw setting value (button + text + current value)
- * @param left         Left-most position in window/panel to start drawing
- * @param right        Right-most position in window/panel to draw
- * @param y            Upper-most position in window/panel to start drawing
- */
 void SettingsPage::DrawSetting(GameSettings *, int left, int right, int y, bool) const
 {
 	bool rtl = _current_text_dir == TD_RTL;
diff --git a/src/settingentry_gui.h b/src/settingentry_gui.h
index 3f20637396..7d602de5df 100644
--- a/src/settingentry_gui.h
+++ b/src/settingentry_gui.h
@@ -87,6 +87,14 @@ struct BaseSettingEntry {
 	static inline int line_height; ///< Height of a single setting.
 
 protected:
+	/**
+	 * Function to draw setting value (button + text + current value)
+	 * @param settings_ptr Pointer to current values of all settings.
+	 * @param left Left-most position in window/panel to start drawing.
+	 * @param right Right-most position in window/panel to draw.
+	 * @param y Upper-most position in window/panel to start drawing.
+	 * @param highlight Whether to highlight the entry.
+	 */
 	virtual void DrawSetting(GameSettings *settings_ptr, int left, int right, int y, bool highlight) const = 0;
 };
 
diff --git a/src/settings.cpp b/src/settings.cpp
index d9bf815547..01f291b148 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -299,13 +299,10 @@ static bool LoadIntList(std::optional<std::string_view> str, void *array, int ne
 }
 
 /**
- * Convert an integer-array (intlist) to a string representation. Each value
+ * Convert a list to a string representation. Each value
  * is separated by a comma or a space character
- * @param buf output buffer where the string-representation will be stored
- * @param last last item to write to in the output buffer
- * @param array pointer to the integer-arrays that is read from
- * @param nelems the number of elements the array holds.
- * @param type the type of elements the array holds (eg INT8, UINT16, etc.)
+ * @param object The object to read the list from.
+ * @return The string representation of the list.
  */
 std::string ListSettingDesc::FormatValue(const void *object) const
 {
@@ -693,7 +690,7 @@ void ListSettingDesc::ParseValue(const IniItem *item, void *object) const
 /**
  * Save the values of settings to the inifile.
  * @param ini pointer to IniFile structure
- * @param sd read-only SettingDesc structure which contains the unmodified,
+ * @param settings_table read-only structure which contains the unmodified,
  *        loaded values of the configuration file and various information about it
  * @param grpname holds the name of the group (eg. [network]) where these will be saved
  * @param object pointer to the object been saved
@@ -1810,8 +1807,7 @@ CommandCost CmdChangeCompanySetting(DoCommandFlags flags, const std::string &nam
 
 /**
  * Top function to save the new value of an element of the Settings struct
- * @param index offset in the SettingDesc array of the Settings struct which
- * identifies the setting member we want to change
+ * @param sd The SettingDesc we want to change.
  * @param value new value of the setting
  * @param force_newgame force the newgame settings
  */
diff --git a/src/settings_gui.cpp b/src/settings_gui.cpp
index 6de6a1f052..38a5257af4 100644
--- a/src/settings_gui.cpp
+++ b/src/settings_gui.cpp
@@ -119,6 +119,7 @@ struct BaseSetTextfileWindow : public TextfileWindow {
 
 /**
  * Open the BaseSet version of the textfile window.
+ * @param parent The parent of this window,
  * @param file_type The type of textfile to display.
  * @param baseset The BaseSet to use.
  * @param content_type STR_CONTENT_TYPE_xxx for title.
diff --git a/src/settingsgen/settingsgen.cpp b/src/settingsgen/settingsgen.cpp
index 70a69eb701..f08ddaba72 100644
--- a/src/settingsgen/settingsgen.cpp
+++ b/src/settingsgen/settingsgen.cpp
@@ -321,8 +321,8 @@ static void AppendFile(std::optional<std::string_view> fname, FILE *out_fp)
 
 /**
  * Compare two files for identity.
- * @param n1 First file.
- * @param n2 Second file.
+ * @param path1 First file.
+ * @param path2 Second file.
  * @return True if both files are identical.
  */
 static bool CompareFiles(std::filesystem::path path1, std::filesystem::path path2)
diff --git a/src/signs_cmd.h b/src/signs_cmd.h
index 1d0f00227b..35142cff68 100644
--- a/src/signs_cmd.h
+++ b/src/signs_cmd.h
@@ -22,6 +22,6 @@ DEF_CMD_TRAIT(Commands::PlaceSign, CmdPlaceSign, CommandFlag::Deity, CommandType
 DEF_CMD_TRAIT(Commands::RenameSign, CmdRenameSign, CommandFlag::Deity, CommandType::OtherManagement)
 DEF_CMD_TRAIT(Commands::MoveSign, CmdMoveSign, CommandFlag::Deity, CommandType::OtherManagement)
 
-void CcPlaceSign(Commands cmd, const CommandCost &result, SignID new_sign);
+void CcPlaceSign(Commands, const CommandCost &result, SignID new_sign);
 
 #endif /* SIGNS_CMD_H */
diff --git a/src/smallmap_gui.cpp b/src/smallmap_gui.cpp
index 84cfb69752..b604c405c8 100644
--- a/src/smallmap_gui.cpp
+++ b/src/smallmap_gui.cpp
@@ -985,6 +985,7 @@ protected:
 	/**
 	 * Adds town names to the smallmap.
 	 * @param dpi the part of the smallmap to be drawn into
+	 * @param vertical_padding The amount to show the industry name above the industry tile.
 	 */
 	void DrawTowns(const DrawPixelInfo *dpi, const int vertical_padding) const
 	{
@@ -1008,6 +1009,7 @@ protected:
 	/**
 	 * Adds industry names to the smallmap.
 	 * @param dpi the part of the smallmap to be drawn into
+	 * @param vertical_padding The amount to show the industry name above the industry tile.
 	 */
 	void DrawIndustryNames(const DrawPixelInfo *dpi, const int vertical_padding) const
 	{
@@ -2095,6 +2097,7 @@ bool ScrollMainWindowTo(int x, int y, int z, bool instant)
 
 /**
  * Determine the middle of a station in the smallmap window.
+ * @param w The smallmap window to get the station middle for.
  * @param st The station we're looking for.
  * @return Middle point of the station in the smallmap window.
  */
diff --git a/src/social_integration.cpp b/src/social_integration.cpp
index 0357fd6c11..d19d579471 100644
--- a/src/social_integration.cpp
+++ b/src/social_integration.cpp
@@ -168,6 +168,7 @@ void SocialIntegration::Initialize()
  *
  * @param plugin Plugin to call the function pointer on.
  * @param func   Function pointer to call.
+ * @param args The arguments to pass to the given function pointer.
  */
 template <typename T, typename... Ts>
 static void PluginCall(std::unique_ptr<InternalSocialIntegrationPlugin> &plugin, T func, Ts... args)
diff --git a/src/sprite.h b/src/sprite.h
index 89488c00c7..7fbef6a49f 100644
--- a/src/sprite.h
+++ b/src/sprite.h
@@ -89,8 +89,12 @@ void DrawCommonTileSeqInGUI(int x, int y, const DrawTileSprites *dts, int32_t or
 
 /**
  * Draw tile sprite sequence on tile with railroad specifics.
+ * @param ti Tile to draw to.
+ * @param dts Sprite and subsprites to draw.
+ * @param to Transparency settings for the sprite.
  * @param total_offset Spriteoffset from normal rail to current railtype.
  * @param newgrf_offset Startsprite of the Action1 to use.
+ * @param default_palette The default recolour sprite to use (typically company colour).
  */
 inline void DrawRailTileSeq(const struct TileInfo *ti, const DrawTileSprites *dts, TransparencyOption to, int32_t total_offset, uint32_t newgrf_offset, PaletteID default_palette)
 {
@@ -99,8 +103,12 @@ inline void DrawRailTileSeq(const struct TileInfo *ti, const DrawTileSprites *dt
 
 /**
  * Draw tile sprite sequence in GUI with railroad specifics.
+ * @param x X position to draw to.
+ * @param y Y position to draw to.
+ * @param dts Sprite and subsprites to draw.
  * @param total_offset Spriteoffset from normal rail to current railtype.
  * @param newgrf_offset Startsprite of the Action1 to use.
+ * @param default_palette The default recolour sprite to use (typically company colour).
  */
 inline void DrawRailTileSeqInGUI(int x, int y, const DrawTileSprites *dts, int32_t total_offset, uint32_t newgrf_offset, PaletteID default_palette)
 {
@@ -109,6 +117,10 @@ inline void DrawRailTileSeqInGUI(int x, int y, const DrawTileSprites *dts, int32
 
 /**
  * Draw TTD sprite sequence on tile.
+ * @param ti Tile to draw to.
+ * @param dts Sprite and subsprites to draw.
+ * @param to Transparency settings for the sprite.
+ * @param default_palette The default recolour sprite to use (typically company colour).
  */
 inline void DrawOrigTileSeq(const struct TileInfo *ti, const DrawTileSprites *dts, TransparencyOption to, PaletteID default_palette)
 {
@@ -117,6 +129,10 @@ inline void DrawOrigTileSeq(const struct TileInfo *ti, const DrawTileSprites *dt
 
 /**
  * Draw TTD sprite sequence in GUI.
+ * @param x X position to draw to.
+ * @param y Y position to draw to.
+ * @param dts Sprite and subsprites to draw.
+ * @param default_palette The default recolour sprite to use (typically company colour).
  */
 inline void DrawOrigTileSeqInGUI(int x, int y, const DrawTileSprites *dts, PaletteID default_palette)
 {
@@ -125,7 +141,11 @@ inline void DrawOrigTileSeqInGUI(int x, int y, const DrawTileSprites *dts, Palet
 
 /**
  * Draw NewGRF industrytile or house sprite layout
+ * @param ti Tile to draw to.
+ * @param dts Sprite and subsprites to draw.
+ * @param to Transparency settings for the sprite.
  * @param stage Sprite inside the Action1 spritesets to use, i.e. construction stage.
+ * @param default_palette The default recolour sprite to use (typically company colour).
  */
 inline void DrawNewGRFTileSeq(const struct TileInfo *ti, const DrawTileSprites *dts, TransparencyOption to, uint32_t stage, PaletteID default_palette)
 {
@@ -134,7 +154,11 @@ inline void DrawNewGRFTileSeq(const struct TileInfo *ti, const DrawTileSprites *
 
 /**
  * Draw NewGRF object in GUI
+ * @param x X position to draw to.
+ * @param y Y position to draw to.
+ * @param dts Sprite and subsprites to draw.
  * @param stage Sprite inside the Action1 spritesets to use, i.e. construction stage.
+ * @param default_palette The default recolour sprite to use (typically company colour)
  */
 inline void DrawNewGRFTileSeqInGUI(int x, int y, const DrawTileSprites *dts, uint32_t stage, PaletteID default_palette)
 {
diff --git a/src/spritecache.cpp b/src/spritecache.cpp
index d9f8b41966..39b40b72d8 100644
--- a/src/spritecache.cpp
+++ b/src/spritecache.cpp
@@ -97,6 +97,7 @@ SpriteFile &OpenCachedSpriteFile(const std::string &filename, Subdirectory subdi
 
 /**
  * Skip the given amount of sprite graphics data.
+ * @param file The file to read from.
  * @param type the type of sprite (compressed etc)
  * @param num the amount of sprites to skip
  * @return true if the data could be correctly skipped.
@@ -168,7 +169,7 @@ uint32_t GetSpriteLocalID(SpriteID sprite)
 
 /**
  * Count the sprites which originate from a specific file in a range of SpriteIDs.
- * @param file The loaded SpriteFile.
+ * @param filename The loaded SpriteFile.
  * @param begin First sprite in range.
  * @param end First sprite not in range.
  * @return Number of sprites.
@@ -553,7 +554,7 @@ size_t GetGRFSpriteOffset(uint32_t id)
 
 /**
  * Parse the sprite section of GRFs.
- * @param container_version Container version of the GRF we're currently processing.
+ * @param file The file to read the sprite offsets for.
  */
 void ReadGRFSpriteOffsets(SpriteFile &file)
 {
@@ -801,6 +802,7 @@ void *UniquePtrSpriteAllocator::AllocatePtr(size_t size)
  * @param sprite ID of loaded sprite
  * @param requested requested sprite type
  * @param sc the currently known sprite cache for the requested sprite
+ * @param allocator Callback that provides the memory when loading sprites.
  * @return fallback sprite
  * @note this function will do UserError() in the case the fallback sprite isn't available
  */
diff --git a/src/spriteloader/grf.cpp b/src/spriteloader/grf.cpp
index a7ddcda139..151a1d3699 100644
--- a/src/spriteloader/grf.cpp
+++ b/src/spriteloader/grf.cpp
@@ -25,7 +25,7 @@ extern const uint8_t _palmap_w2d[];
 /**
  * We found a corrupted sprite. This means that the sprite itself
  * contains invalid data or is too small for the given dimensions.
- * @param file_slot the file the errored sprite is in
+ * @param file The file the errored sprite is in.
  * @param file_pos the location in the file of the errored sprite
  * @param line the line where the error occurs.
  * @return always false (to tell loading the sprite failed)
diff --git a/src/station_base.h b/src/station_base.h
index 18c4fbbc2d..76074358b6 100644
--- a/src/station_base.h
+++ b/src/station_base.h
@@ -637,7 +637,7 @@ void RebuildStationKdtree();
 /**
  * Call a function on all stations that have any part of the requested area within their catchment.
  * @tparam Func The type of function to call
- * @param area The TileArea to check
+ * @param ta The TileArea to check.
  * @param func The function to call, must take two parameters: Station* and TileIndex and return true
  *             if coverage of that tile is acceptable for a given station or false if search should continue
  */
diff --git a/src/station_cmd.cpp b/src/station_cmd.cpp
index f21b1bb639..2a3fad43c3 100644
--- a/src/station_cmd.cpp
+++ b/src/station_cmd.cpp
@@ -876,7 +876,7 @@ static StringID GetBridgeTooLowMessageForStationType(StationType type)
 /**
  * Test if a bridge can be built above a station.
  * @param tile Tile to test.
- * @param spec Custom station spec to test.
+ * @param bridgeable_info Minimum height before bridge is okay for each of the layouts.
  * @param type Type of station.
  * @param layout Layout piece of road station to test.
  * @param bridge_height Height of bridge to test.
@@ -1250,6 +1250,7 @@ StationGfx RailStationTileLayout::Iterator::operator*() const
  * @param adjacent whether adjacent stations are allowed
  * @param ta the area of the newly build station
  * @param st 'return' pointer for the found station
+ * @param filter The filter to remove unwanted stations.
  * @return command cost with the error or 'okay'
  */
 template <class T, StringID error_message, class F>
@@ -2022,7 +2023,7 @@ static CommandCost FindJoiningRoadStop(StationID existing_stop, StationID statio
  * @param unit_cost The cost to build one road stop of the current type.
  * @return The cost in case of success, or an error code if it failed.
  */
-CommandCost CalculateRoadStopCost(TileArea tile_area, DoCommandFlags flags, bool is_drive_through, StationType station_type, const RoadStopSpec *roadstopspec, Axis axis, DiagDirection ddir, StationID *est, RoadType rt, Money unit_cost)
+CommandCost CalculateRoadStopCost(TileArea tile_area, DoCommandFlags flags, bool is_drive_through, StationType station_type, const RoadStopSpec *roadstopspec, Axis axis, DiagDirection ddir, StationID *station, RoadType rt, Money unit_cost)
 {
 	DiagDirections invalid_dirs{};
 	if (is_drive_through) {
@@ -2036,7 +2037,7 @@ CommandCost CalculateRoadStopCost(TileArea tile_area, DoCommandFlags flags, bool
 	int allowed_z = -1;
 	CommandCost cost(EXPENSES_CONSTRUCTION);
 	for (TileIndex cur_tile : tile_area) {
-		CommandCost ret = CheckFlatLandRoadStop(cur_tile, allowed_z, roadstopspec, flags, invalid_dirs, is_drive_through, station_type, axis, est, rt);
+		CommandCost ret = CheckFlatLandRoadStop(cur_tile, allowed_z, roadstopspec, flags, invalid_dirs, is_drive_through, station_type, axis, station, rt);
 		if (ret.Failed()) return ret;
 
 		bool is_preexisting_roadstop = IsTileType(cur_tile, TileType::Station) && IsAnyRoadStop(cur_tile);
@@ -2589,7 +2590,7 @@ Town *AirportGetNearestTown(const AirportSpec *as, Direction rotation, TileIndex
 /**
  * Finds the town nearest to given existing airport. Based on minimal manhattan distance to any airport's tile.
  * If two towns have the same distance, town with lower index is returned.
- * @param station existing station with airport
+ * @param st Existing station with airport.
  * @param[out] mindist Minimum distance to town
  * @return nearest town to airport
  */
@@ -4256,7 +4257,8 @@ void DeleteStaleLinks(Station *from)
  * @param next_station_id Station the consist will be travelling to next.
  * @param capacity Capacity to add to link stat.
  * @param usage Usage to add to link stat.
- * @param mode Update mode to be applied.
+ * @param time The travel time for the link.
+ * @param modes Update modes to be applied.
  */
 void IncreaseStats(Station *st, CargoType cargo, StationID next_station_id, uint capacity, uint usage, uint32_t time, EdgeUpdateModes modes)
 {
@@ -4309,6 +4311,7 @@ void IncreaseStats(Station *st, CargoType cargo, StationID next_station_id, uint
  * @param st Station to get the link stats from.
  * @param front First vehicle in the consist.
  * @param next_station_id Station the consist will be travelling to next.
+ * @param time The travel time for the links.
  */
 void IncreaseStats(Station *st, const Vehicle *front, StationID next_station_id, uint32_t time)
 {
diff --git a/src/station_cmd.h b/src/station_cmd.h
index b44a83ea39..0ce331653a 100644
--- a/src/station_cmd.h
+++ b/src/station_cmd.h
@@ -43,6 +43,6 @@ DEF_CMD_TRAIT(Commands::RenameStation, CmdRenameStation, {}, CommandType::OtherM
 DEF_CMD_TRAIT(Commands::MoveStationName, CmdMoveStationName, {}, CommandType::OtherManagement)
 DEF_CMD_TRAIT(Commands::OpenCloseAirport, CmdOpenCloseAirport, {}, CommandType::RouteManagement)
 
-void CcMoveStationName(Commands cmd, const CommandCost &result, StationID station_id);
+void CcMoveStationName(Commands, const CommandCost &result, StationID station_id);
 
 #endif /* STATION_CMD_H */
diff --git a/src/station_gui.cpp b/src/station_gui.cpp
index ccf85470d9..32271ce2d0 100644
--- a/src/station_gui.cpp
+++ b/src/station_gui.cpp
@@ -1097,7 +1097,7 @@ void CargoDataEntry::Clear()
 
 /**
  * Remove a subentry from this one and delete it.
- * @param child the entry to be removed. This may also be a synthetic entry
+ * @param entry The entry to be removed. This may also be a synthetic entry
  * which only contains the ID of the entry to be removed. In this case child is
  * not deleted.
  */
@@ -1489,7 +1489,7 @@ struct StationViewWindow : public Window {
 	/**
 	 * Rebuild the cache for estimated destinations which is used to quickly show the "destination" entries
 	 * even if we actually don't know the destination of a certain packet from just looking at it.
-	 * @param i Cargo to recalculate the cache for.
+	 * @param cargo Cargo to recalculate the cache for.
 	 */
 	void RecalcDestinations(CargoType cargo)
 	{
@@ -2450,9 +2450,9 @@ static bool StationJoinerNeeded(const StationPickerCmdProc &proc)
 
 /**
  * Show the station selection window when needed. If not, build the station.
- * @param cmd Command to build the station.
  * @param ta Area to build the station in
- * @tparam the class to find stations for
+ * @param proc Callback to check whether we can build.
+ * @tparam T the class to find stations for
  */
 template <class T>
 void ShowSelectBaseStationIfNeeded(TileArea ta, StationPickerCmdProc&& proc)
diff --git a/src/story_base.h b/src/story_base.h
index 8e1a83bd9f..a665a70ece 100644
--- a/src/story_base.h
+++ b/src/story_base.h
@@ -111,7 +111,7 @@ enum StoryPageButtonCursor : uint8_t {
 /**
  * Checks if a StoryPageButtonCursor value is valid.
  *
- * @param wc The value to check
+ * @param cursor The value to check.
  * @return true if the given value is a valid StoryPageButtonCursor.
  */
 inline bool IsValidStoryPageButtonCursor(StoryPageButtonCursor cursor)
diff --git a/src/story_gui.cpp b/src/story_gui.cpp
index f69ae83a36..65bd5c9db9 100644
--- a/src/story_gui.cpp
+++ b/src/story_gui.cpp
@@ -507,7 +507,7 @@ protected:
 	 * @param width Width of the region available for drawing.
 	 * @param line_height Height of one line of text.
 	 * @param action_sprite The sprite to draw.
-	 * @param string_id The string id to draw.
+	 * @param text The text to draw.
 	 * @return the number of lines.
 	 */
 	void DrawActionElement(int &y_offset, int width, int line_height, SpriteID action_sprite, const std::string &text) const
diff --git a/src/strgen/strgen.h b/src/strgen/strgen.h
index d659b904df..fd6dc9ca85 100644
--- a/src/strgen/strgen.h
+++ b/src/strgen/strgen.h
@@ -74,7 +74,8 @@ struct StringReader {
 
 	/**
 	 * Handle the pragma of the file.
-	 * @param str    The pragma string to parse.
+	 * @param str The pragma string to parse.
+	 * @param lang The header metadata to write the parsed pragma data to.
 	 */
 	virtual void HandlePragma(std::string_view str, LanguagePackHeader &lang);
 
diff --git a/src/string.cpp b/src/string.cpp
index 87651a2486..f2ba7163cb 100644
--- a/src/string.cpp
+++ b/src/string.cpp
@@ -343,7 +343,7 @@ bool StrContainsIgnoreCase(std::string_view str, std::string_view value)
 /**
  * Get the length of an UTF-8 encoded string in number of characters
  * and thus not the number of bytes that the encoded string contains.
- * @param s The string to get the length for.
+ * @param str The string to get the length for.
  * @return The length of the string in characters.
  */
 size_t Utf8StringLength(std::string_view str)
diff --git a/src/stringfilter_type.h b/src/stringfilter_type.h
index ed79926f79..75b73b6677 100644
--- a/src/stringfilter_type.h
+++ b/src/stringfilter_type.h
@@ -45,6 +45,7 @@ public:
 	/**
 	 * Constructor for filter.
 	 * @param case_sensitive Pointer to a (usually static) variable controlling the case-sensitivity. nullptr means always case-insensitive.
+	 * @param locale_aware Whether to match using the locale.
 	 */
 	StringFilter(const bool *case_sensitive = nullptr, bool locale_aware = true) : case_sensitive(case_sensitive), locale_aware(locale_aware) {}
 
diff --git a/src/strings.cpp b/src/strings.cpp
index 955b5bd0fe..140bc23a3c 100644
--- a/src/strings.cpp
+++ b/src/strings.cpp
@@ -406,7 +406,7 @@ void GetStringWithArgs(StringBuilder &builder, StringID string, StringParameters
  * Get a parsed string with most special stringcodes replaced by the string parameters.
  * @param builder The builder of the string.
  * @param string The ID of the string to parse.
- * @param args Span of arguments for the string.
+ * @param params Span of arguments for the string.
  * @param case_index The "case index". This will only be set when FormatString wants to print the string in a different case.
  * @param game_script The string is coming directly from a game script.
  */
@@ -962,7 +962,8 @@ static const Units GetVelocityUnits(VehicleType type)
 
 /**
  * Convert the given (internal) speed to the display speed.
- * @param speed the speed to convert
+ * @param speed The speed to convert.
+ * @param type The associated vehicle type.
  * @return the converted speed.
  */
 uint ConvertSpeedToDisplaySpeed(uint speed, VehicleType type)
@@ -975,7 +976,8 @@ uint ConvertSpeedToDisplaySpeed(uint speed, VehicleType type)
 
 /**
  * Convert the given display speed to the (internal) speed.
- * @param speed the speed to convert
+ * @param speed The speed to convert.
+ * @param type The associated vehicle type.
  * @return the converted speed.
  */
 uint ConvertDisplaySpeedToSpeed(uint speed, VehicleType type)
@@ -985,7 +987,8 @@ uint ConvertDisplaySpeedToSpeed(uint speed, VehicleType type)
 
 /**
  * Convert the given km/h-ish speed to the display speed.
- * @param speed the speed to convert
+ * @param speed The speed to convert.
+ * @param type The associated vehicle type.
  * @return the converted speed.
  */
 uint ConvertKmhishSpeedToDisplaySpeed(uint speed, VehicleType type)
@@ -995,7 +998,8 @@ uint ConvertKmhishSpeedToDisplaySpeed(uint speed, VehicleType type)
 
 /**
  * Convert the given display speed to the km/h-ish speed.
- * @param speed the speed to convert
+ * @param speed The speed to convert.
+ * @param type The associated vehicle type.
  * @return the converted speed.
  */
 uint ConvertDisplaySpeedToKmhishSpeed(uint speed, VehicleType type)
@@ -1099,6 +1103,8 @@ static bool IsColourSafe(std::string_view buffer)
  * @param builder The string builder to write the final string to.
  * @param str_arg The original string with format codes.
  * @param args    Pointer to extra arguments used by various string codes.
+ * @param orig_case_index The selected case when entering the function.
+ * @param game_script Whether this string originates from a game-script.
  * @param dry_run True when the args' type data is not yet initialized.
  */
 static void FormatString(StringBuilder &builder, std::string_view str_arg, StringParameters &args, uint orig_case_index, bool game_script, bool dry_run)
diff --git a/src/survey.cpp b/src/survey.cpp
index ccc30c1ea3..1953b45ce0 100644
--- a/src/survey.cpp
+++ b/src/survey.cpp
@@ -160,6 +160,7 @@ static void SurveySettingsTable(nlohmann::json &survey, const SettingTable &tabl
  * Convert settings to JSON.
  *
  * @param survey The JSON object.
+ * @param skip_if_default If true, skip any settings that are on their default value.
  */
 void SurveySettings(nlohmann::json &survey, bool skip_if_default)
 {
diff --git a/src/terraform_cmd.cpp b/src/terraform_cmd.cpp
index 4e4bc7f126..332745909e 100644
--- a/src/terraform_cmd.cpp
+++ b/src/terraform_cmd.cpp
@@ -309,7 +309,7 @@ std::tuple<CommandCost, Money, TileIndex> CmdTerraformLand(DoCommandFlags flags,
  * @param tile end tile of area-drag
  * @param start_tile start tile of area drag
  * @param diagonal Whether to use the Diagonal or Orthogonal tile iterator.
- * @param LevelMode Mode of leveling \c LevelMode.
+ * @param lm Mode of leveling \c LevelMode.
  * @return the cost of this operation or an error
  */
 std::tuple<CommandCost, Money, TileIndex> CmdLevelLand(DoCommandFlags flags, TileIndex tile, TileIndex start_tile, bool diagonal, LevelMode lm)
diff --git a/src/textbuf.cpp b/src/textbuf.cpp
index 50b8e4030d..77a35751ce 100644
--- a/src/textbuf.cpp
+++ b/src/textbuf.cpp
@@ -151,7 +151,7 @@ bool Textbuf::InsertChar(char32_t key)
  * @param marked Replace the currently marked text with the new text.
  * @param caret Move the caret to this point in the insertion string.
  * @param insert_location Position at which to insert the string.
- * @param replacement_end Replace all characters from #insert_location up to this location with the new string.
+ * @param replacement_end Replace all characters from insert_location up to this location with the new string.
  * @return True on successful change of Textbuf, or false otherwise.
  */
 bool Textbuf::InsertString(std::string_view str, bool marked, std::optional<size_t> caret, std::optional<size_t> insert_location, std::optional<size_t> replacement_end)
diff --git a/src/town_cmd.cpp b/src/town_cmd.cpp
index 38582f3df3..8e4ac627b7 100644
--- a/src/town_cmd.cpp
+++ b/src/town_cmd.cpp
@@ -525,7 +525,7 @@ static void AdvanceHouseConstruction(TileIndex tile)
 /**
  * Generate cargo for a house, scaled by the current economy scale.
  * @param t The current town.
- * @param ct Type of cargo to generate, usually CT_PASSENGERS or CT_MAIL.
+ * @param cargo Type of cargo to generate, usually CT_PASSENGERS or CT_MAIL.
  * @param amount The number of cargo units.
  * @param stations Available stations for this house.
  * @param affected_by_recession Is this cargo halved during recessions?
@@ -1208,6 +1208,7 @@ static RoadBits GetTownRoadGridElement(Town *t, TileIndex tile, DiagDirection di
  *
  * @param t The current town.
  * @param tile The target tile for the extra house.
+ * @param modes The parts of the town that are being grown.
  * @return true if an extra house has been added.
  */
 static bool GrowTownWithExtraHouse(Town *t, TileIndex tile, TownExpandModes modes)
@@ -1530,6 +1531,7 @@ enum class TownGrowthResult {
  * @param cur_rb The current tiles RoadBits
  * @param target_dir The target road dir
  * @param t1 The current town
+ * @param modes The parts of the town that are being grown.
  * @return Result so far.
  */
 static TownGrowthResult GrowTownInTile(TileIndex *tile_ptr, RoadBits cur_rb, DiagDirection target_dir, Town *t1, TownExpandModes modes)
@@ -1746,6 +1748,7 @@ static TownGrowthResult GrowTownInTile(TileIndex *tile_ptr, RoadBits cur_rb, Dia
  * This only checks trivial but often cases.
  * @param tile Start tile for road.
  * @param dir Direction for road to follow or build.
+ * @param modes The parts of the town that are being grown.
  * @return true If road is or can be connected in the specified direction.
  */
 static bool CanFollowRoad(TileIndex tile, DiagDirection dir, TownExpandModes modes)
@@ -1788,6 +1791,7 @@ static bool CanFollowRoad(TileIndex tile, DiagDirection dir, TownExpandModes mod
  * Try to grow a town at a given road tile.
  * @param t The town to grow.
  * @param tile The road tile to try growing from.
+ * @param modes The parts of the town that are being grown.
  * @return true if we successfully expanded the town.
  */
 static bool GrowTownAtRoad(Town *t, TileIndex tile, TownExpandModes modes)
@@ -1892,6 +1896,7 @@ static RoadBits GenRandomRoadBits()
 /**
  * Grow the town.
  * @param t The town to grow
+ * @param modes The parts of the town that are being grown.
  * @return true if we successfully grew the town with a road or house.
  */
 static bool GrowTown(Town *t, TownExpandModes modes)
@@ -2553,11 +2558,11 @@ static inline void ClearMakeHouseTile(TileIndex tile, Town *t, uint8_t counter,
 
 /**
  * Write house information into the map. For multi-tile houses, all tiles are marked.
- * @param town The town related to this house
- * @param t The tile to build on. If a multi-tile house, this is the northern-most tile.
+ * @param tile The tile to build on. If a multi-tile house, this is the northern-most tile.
+ * @param t The town related to this house
  * @param counter The counter of the construction stage.
+ * @param type The type of house.
  * @param stage The current construction stage.
- * @param The type of house.
  * @param random_bits Random bits for newgrf houses to use.
  * @param is_protected Whether the house is protected from the town upgrading it.
  * @pre The house can be built here.
@@ -2646,6 +2651,7 @@ static bool CheckFree2x2Area(TileIndex tile, int z, bool noslope)
  * Checks if the current town layout allows building here.
  * @param t The town.
  * @param tile The tile to check.
+ * @param modes The parts of the town that are being grown.
  * @return true iff town layout allows building here.
  * @note see layouts
  */
@@ -2679,6 +2685,7 @@ static inline bool TownLayoutAllowsHouseHere(Town *t, TileIndex tile, TownExpand
  * Checks if the current town layout allows a 2x2 building here.
  * @param t The town.
  * @param tile The tile to check.
+ * @param modes The parts of the town that are being grown.
  * @return true iff town layout allows a 2x2 building here.
  * @note see layouts
  */
@@ -2720,6 +2727,7 @@ static inline bool TownLayoutAllows2x2HouseHere(Town *t, TileIndex tile, TownExp
  * @param maxz The maximum Z level, since all tiles must have the same height.
  * @param noslope Are foundations disallowed for this house?
  * @param second The diagdir from the first tile to the second tile.
+ * @param modes The parts of the town that are being grown.
  */
 static bool CheckTownBuild2House(TileIndex *tile, Town *t, int maxz, bool noslope, DiagDirection second, TownExpandModes modes)
 {
@@ -2745,6 +2753,7 @@ static bool CheckTownBuild2House(TileIndex *tile, Town *t, int maxz, bool noslop
  * @param t The town.
  * @param maxz The maximum Z level, since all tiles must have the same height.
  * @param noslope Are foundations disallowed for this house?
+ * @param modes The parts of the town that are being grown.
  */
 static bool CheckTownBuild2x2House(TileIndex *tile, Town *t, int maxz, bool noslope, TownExpandModes modes)
 {
@@ -2809,6 +2818,7 @@ static void BuildTownHouse(Town *t, TileIndex tile, const HouseSpec *hs, HouseID
  * Tries to build a house at this tile.
  * @param t The town the house will belong to.
  * @param tile The tile to try building on.
+ * @param modes The parts of the town that are being grown.
  * @return false iff no house can be built on this tile.
  */
 static bool TryBuildTownHouse(Town *t, TileIndex tile, TownExpandModes modes)
@@ -2939,7 +2949,7 @@ static bool TryBuildTownHouse(Town *t, TileIndex tile, TownExpandModes modes)
  * Place an individual house.
  * @param flags Type of operation.
  * @param tile Tile on which to place the house.
- * @param HouseID The HouseID of the house spec.
+ * @param house The HouseID of the house spec.
  * @param is_protected Whether the house is protected from the town upgrading it.
  * @param replace Whether to automatically demolish an existing house on this tile, if present.
  * @return Empty cost or an error.
@@ -3005,7 +3015,7 @@ CommandCost CmdPlaceHouse(DoCommandFlags flags, TileIndex tile, HouseID house, b
  * @param flags Type of operation.
  * @param tile End tile of area dragging.
  * @param start_tile Start tile of area dragging.
- * @param HouseID The HouseID of the house spec.
+ * @param house The HouseID of the house spec.
  * @param is_protected Whether the house is protected from the town upgrading it.
  * @param replace Whether we can replace existing houses.
  * @param diagonal Whether to use the Diagonal or Orthogonal tile iterator.
@@ -3303,7 +3313,8 @@ CommandCost CmdTownRating(DoCommandFlags flags, TownID town_id, CompanyID compan
 /**
  * Expand a town (scenario editor only).
  * @param flags Type of operation.
- * @param TownID Town ID to expand.
+ * @param town_id Town ID to expand.
+ * @param modes The parts of the town that are being grown.
  * @param grow_amount Amount to grow, or 0 to grow a random size up to the current amount of houses.
  * @return Empty cost or an error.
  */
diff --git a/src/town_gui.cpp b/src/town_gui.cpp
index 1eb664ce1f..073a9aaea1 100644
--- a/src/town_gui.cpp
+++ b/src/town_gui.cpp
@@ -834,6 +834,7 @@ public:
 	/**
 	 * Get the string to draw the town name.
 	 * @param t Town to draw.
+	 * @param population The population of the town.
 	 * @return The string to use.
 	 */
 	static std::string GetTownString(const Town *t, uint64_t population)
diff --git a/src/train_cmd.cpp b/src/train_cmd.cpp
index 43b7fdcae1..eb5f54a258 100644
--- a/src/train_cmd.cpp
+++ b/src/train_cmd.cpp
@@ -489,6 +489,7 @@ static SpriteID GetDefaultTrainSprite(uint8_t spritenum, Direction direction)
  * Get the sprite to display the train.
  * @param direction Direction of view/travel.
  * @param image_type Visualisation context.
+ * @param result Sprite sequence to add the to be drawn sprites to.
  * @return Sprite to display.
  */
 void Train::GetImage(Direction direction, EngineImageType image_type, VehicleSpriteSeq *result) const
diff --git a/src/train_cmd.h b/src/train_cmd.h
index b503d297c5..35fdb0533e 100644
--- a/src/train_cmd.h
+++ b/src/train_cmd.h
@@ -26,6 +26,6 @@ DEF_CMD_TRAIT(Commands::MoveRailVehicle, CmdMoveRailVehicle, CommandFlag::Locati
 DEF_CMD_TRAIT(Commands::ForceTrainProceed, CmdForceTrainProceed, CommandFlag::Location, CommandType::VehicleManagement)
 DEF_CMD_TRAIT(Commands::ReverseTrainDirection, CmdReverseTrainDirection, CommandFlag::Location, CommandType::VehicleManagement)
 
-void CcBuildWagon(Commands cmd, const CommandCost &result, VehicleID new_veh_id, uint, uint16_t, CargoArray, TileIndex tile, EngineID, bool, CargoType, ClientID);
+void CcBuildWagon(Commands, const CommandCost &result, VehicleID new_veh_id, uint, uint16_t, CargoArray, TileIndex tile, EngineID, bool, CargoType, ClientID);
 
 #endif /* TRAIN_CMD_H */
diff --git a/src/tunnel_map.h b/src/tunnel_map.h
index 975585c0ca..0575e84575 100644
--- a/src/tunnel_map.h
+++ b/src/tunnel_map.h
@@ -45,7 +45,8 @@ bool IsTunnelInWayDir(TileIndex tile, int z, DiagDirection dir);
  * @param t the entrance of the tunnel
  * @param o the owner of the entrance
  * @param d the direction facing out of the tunnel
- * @param r the road type used in the tunnel
+ * @param road_rt The road type used in the tunnel.
+ * @param tram_rt The tram type used in the tunnel.
  */
 inline void MakeRoadTunnel(Tile t, Owner o, DiagDirection d, RoadType road_rt, RoadType tram_rt)
 {
diff --git a/src/tunnelbridge_cmd.cpp b/src/tunnelbridge_cmd.cpp
index 10ef8d4295..c7eef51c9c 100644
--- a/src/tunnelbridge_cmd.cpp
+++ b/src/tunnelbridge_cmd.cpp
@@ -258,6 +258,7 @@ CommandCost CheckBridgeAvailability(BridgeType bridge_type, uint bridge_len, DoC
 /**
  * Calculate the base cost of clearing a tunnel/bridge per tile.
  * @param tile Start tile of the tunnel/bridge.
+ * @param base_price The base cost for clearing the tile.
  * @return How much clearing this tunnel/bridge costs per tile.
  */
 static Money TunnelBridgeClearCost(TileIndex tile, Price base_price)
diff --git a/src/vehicle.cpp b/src/vehicle.cpp
index b8b2576e09..206d928994 100644
--- a/src/vehicle.cpp
+++ b/src/vehicle.cpp
@@ -1909,6 +1909,7 @@ UnitID GetFreeUnitNumber(VehicleType type)
  * vehicle type. This to disable building stations etc. when
  * you are not allowed/able to have the vehicle type yet.
  * @param type the vehicle type to check this for
+ * @param subtype The vehicle's sub to to check this for.
  * @return true if there is any reason why you may build
  *         the infrastructure for the given vehicle type
  */
@@ -2318,6 +2319,7 @@ void Vehicle::BeginLoading()
 /**
  * Return all reserved cargo packets to the station and reset all packets
  * staged for transfer.
+ * @param next ID of the next station the cargo wants to go to.
  * @param st the station where the reserved packets should go.
  */
 void Vehicle::CancelReservation(StationID next, Station *st)
@@ -3266,7 +3268,7 @@ uint32_t Vehicle::GetDisplayMinPowerToWeight() const
 /**
  * Checks if two vehicle chains have the same list of engines.
  * @param v1 First vehicle chain.
- * @param v1 Second vehicle chain.
+ * @param v2 Second vehicle chain.
  * @return True if same, false if different.
  */
 bool VehiclesHaveSameEngineList(const Vehicle *v1, const Vehicle *v2)
@@ -3283,7 +3285,7 @@ bool VehiclesHaveSameEngineList(const Vehicle *v1, const Vehicle *v2)
 /**
  * Checks if two vehicles have the same list of orders.
  * @param v1 First vehicles.
- * @param v1 Second vehicles.
+ * @param v2 Second vehicles.
  * @return True if same, false if different.
  */
 bool VehiclesHaveSameOrderList(const Vehicle *v1, const Vehicle *v2)
diff --git a/src/vehicle_base.h b/src/vehicle_base.h
index fcb5d8e98d..319c95ebd1 100644
--- a/src/vehicle_base.h
+++ b/src/vehicle_base.h
@@ -1129,7 +1129,7 @@ struct SpecializedVehicle : public Vehicle {
 
 	/**
 	 * Creates a new T-object in the vehicle pool.
-	 * @param args... The arguments to the constructor.
+	 * @param args The arguments to the constructor.
 	 * @return The created object.
 	 */
 	template <typename... Targs>
@@ -1141,7 +1141,7 @@ struct SpecializedVehicle : public Vehicle {
 	/**
 	 * Creates a new T-object in the vehicle pool.
 	 * @param index The index allocate the object at.
-	 * @param args... The arguments to the constructor.
+	 * @param args The arguments to the constructor.
 	 * @return The created object.
 	 */
 	template <typename... Targs>
diff --git a/src/vehicle_cmd.h b/src/vehicle_cmd.h
index 406396168e..1c6934c74e 100644
--- a/src/vehicle_cmd.h
+++ b/src/vehicle_cmd.h
@@ -41,8 +41,8 @@ DEF_CMD_TRAIT(Commands::MassStartStop, CmdMassStartStopVehicle, {}, CommandType:
 DEF_CMD_TRAIT(Commands::DepotMassSell, CmdDepotSellAllVehicles, {}, CommandType::VehicleConstruction)
 DEF_CMD_TRAIT(Commands::DepotMassAutoreplace, CmdDepotMassAutoReplace, {}, CommandType::VehicleConstruction)
 
-void CcBuildPrimaryVehicle(Commands cmd, const CommandCost &result, VehicleID new_veh_id, uint, uint16_t, CargoArray);
-void CcStartStopVehicle(Commands cmd, const CommandCost &result, VehicleID veh_id, bool);
+void CcBuildPrimaryVehicle(Commands, const CommandCost &result, VehicleID new_veh_id, uint, uint16_t, CargoArray);
+void CcStartStopVehicle(Commands, const CommandCost &result, VehicleID veh_id, bool);
 
 template <typename Tcont, typename Titer>
 inline EndianBufferWriter<Tcont, Titer> &operator <<(EndianBufferWriter<Tcont, Titer> &buffer, const CargoArray &cargo_array)
diff --git a/src/video/cocoa/cocoa_wnd.mm b/src/video/cocoa/cocoa_wnd.mm
index c5550b0d62..c1ab9ff3d8 100644
--- a/src/video/cocoa/cocoa_wnd.mm
+++ b/src/video/cocoa/cocoa_wnd.mm
@@ -823,7 +823,10 @@ void CocoaDialog(std::string_view title, std::string_view message, std::string_v
 
 /**
  * Internal handler of keyboard keys.
- * @param event Information about occurred event.
+ * @param keycode The raw keycode of the key press.
+ * @param unicode The unicode character of the key press.
+ * @param down Whether pressing or releasing the key.
+ * @param modifiers Flags to denote other (special) keys that might have been pressed.
  * @return Whether event should be interpreted.
  */
 - (BOOL)internalHandleKeycode:(unsigned short)keycode unicode:(char32_t)unicode pressed:(BOOL)down modifiers:(NSUInteger)modifiers
diff --git a/src/video/opengl.cpp b/src/video/opengl.cpp
index dcdcdc9f1d..36b29cb839 100644
--- a/src/video/opengl.cpp
+++ b/src/video/opengl.cpp
@@ -1270,6 +1270,7 @@ void OpenGLBackend::ReleaseAnimBuffer(const Rect &update_rect)
 /**
  * Render a sprite to the back buffer.
  * @param gl_sprite Sprite to render.
+ * @param pal The palette to draw the sprite with.
  * @param x X position of the sprite.
  * @param y Y position of the sprite.
  * @param zoom Zoom level to use.
@@ -1395,6 +1396,7 @@ void OpenGLBackend::RenderOglSprite(const OpenGLSprite *gl_sprite, PaletteID pal
 
 /**
  * Create an OpenGL sprite with a palette remap part.
+ * @param sprite_type The type of sprite to load.
  * @param sprite The sprite to create the OpenGL sprite for
  */
 OpenGLSprite::OpenGLSprite(SpriteType sprite_type, const SpriteLoader::SpriteCollection &sprite)
diff --git a/src/viewport.cpp b/src/viewport.cpp
index 0609db4b7c..f7da6ccefc 100644
--- a/src/viewport.cpp
+++ b/src/viewport.cpp
@@ -650,14 +650,9 @@ static void AddCombinedSprite(SpriteID image, PaletteID pal, int x, int y, int z
  * @param pal the provided palette,
  * @param x position X (world) of the sprite,
  * @param y position Y (world) of the sprite,
- * @param w bounding box extent towards positive X (world),
- * @param h bounding box extent towards positive Y (world),
- * @param dz bounding box extent towards positive Z (world),
  * @param z position Z (world) of the sprite,
+ * @param bounds Bounding box extent towards positive X/Y/Z (world).
  * @param transparent if true, switch the palette between the provided palette and the transparent palette,
- * @param bb_offset_x bounding box extent towards negative X (world),
- * @param bb_offset_y bounding box extent towards negative Y (world),
- * @param bb_offset_z bounding box extent towards negative Z (world)
  * @param sub Only draw a part of the sprite.
  */
 void AddSortableSpriteToDraw(SpriteID image, PaletteID pal, int x, int y, int z, const SpriteBounds &bounds, bool transparent, const SubSprite *sub)
diff --git a/src/water_cmd.cpp b/src/water_cmd.cpp
index 78d07707cb..5a469f0f0a 100644
--- a/src/water_cmd.cpp
+++ b/src/water_cmd.cpp
@@ -833,6 +833,7 @@ static void DrawCanalWater(TileIndex tile)
  * @param base    Base sprite.
  * @param offset  Additional sprite offset.
  * @param palette Palette to use.
+ * @param feature The canal feature to get the sprite offset to apply from.
  */
 static void DrawWaterTileStruct(const TileInfo *ti, std::span<const DrawTileSeqStruct> seq, SpriteID base, uint offset, PaletteID palette, CanalFeature feature)
 {
diff --git a/src/waypoint_cmd.h b/src/waypoint_cmd.h
index f7f89aeea2..96ae377a0d 100644
--- a/src/waypoint_cmd.h
+++ b/src/waypoint_cmd.h
@@ -32,6 +32,6 @@ DEF_CMD_TRAIT(Commands::BuildBuoy, CmdBuildBuoy, CommandFlag::Auto, CommandType:
 DEF_CMD_TRAIT(Commands::RenameWaypoint, CmdRenameWaypoint, {}, CommandType::OtherManagement)
 DEF_CMD_TRAIT(Commands::MoveWaypointNAme, CmdMoveWaypointName, {}, CommandType::OtherManagement)
 
-void CcMoveWaypointName(Commands cmd, const CommandCost &result, StationID waypoint_id);
+void CcMoveWaypointName(Commands, const CommandCost &result, StationID waypoint_id);
 
 #endif /* WAYPOINT_CMD_H */
diff --git a/src/widget.cpp b/src/widget.cpp
index eaadef11ef..e2c00cf54f 100644
--- a/src/widget.cpp
+++ b/src/widget.cpp
@@ -53,7 +53,7 @@ static inline RectPadding ScaleGUITrad(const RectPadding &r)
 
 /**
  * Scale a Dimension to GUI zoom level.
- * @param d Dimension at ZOOM_BASE (traditional "normal" interface size).
+ * @param dim Dimension at ZOOM_BASE (traditional "normal" interface size).
  * @return Dimension at current interface size.
  */
 static inline Dimension ScaleGUITrad(const Dimension &dim)
@@ -975,6 +975,7 @@ void NWidgetBase::AdjustPaddingForZoom()
 /**
  * Constructor for resizable nested widgets.
  * @param tp     Nested widget type.
+ * @param index Index of the widget within the window.
  * @param fill_x Horizontal fill step size, \c 0 means no filling is allowed.
  * @param fill_y Vertical fill step size, \c 0 means no filling is allowed.
  */
@@ -1080,7 +1081,7 @@ void NWidgetResizeBase::SetResize(uint resize_x, uint resize_y)
  * Try to set optimum widget size for a multiline text widget.
  * The window will need to be reinited if the size is changed.
  * @param str Multiline string contents that will fill the widget.
- * @param max_line Maximum number of lines.
+ * @param max_lines Maximum number of lines.
  * @return true iff the widget minimum size has changed.
  */
 bool NWidgetResizeBase::UpdateMultilineWidgetSize(const std::string &str, int max_lines)
@@ -2440,7 +2441,7 @@ Scrollbar::size_type Scrollbar::GetScrolledRowFromWidget(int clickpos, const Win
  * With WKC_HOME the first position is selected and with WKC_END the last position is selected.
  * This function ensures that pos is in the range [0..count).
  * @param list_position The current position in the list.
- * @param key_code      The pressed key code.
+ * @param keycode The pressed key code.
  * @return ES_NOT_HANDLED when another key than the 6 specific keys was pressed, otherwise ES_HANDLED.
  */
 EventState Scrollbar::UpdateListPositionOnKeyPress(int &list_position, uint16_t keycode) const
@@ -3426,7 +3427,7 @@ std::unique_ptr<NWidgetBase> MakeWindowNWidgetTree(std::span<const NWidgetPart>
  * Make a number of rows with button-like graphics, for enabling/disabling each company.
  * @param widget_first The first widget index to use.
  * @param widget_last The last widget index to use.
- * @param colour The colour in which to draw the button.
+ * @param button_colour The colour in which to draw the button.
  * @param max_length Maximal number of company buttons in one row.
  * @param button_tooltip The tooltip-string of every button.
  * @param resizable Whether the rows are resizable.
diff --git a/src/widget_type.h b/src/widget_type.h
index 031a1027b2..844eae96b6 100644
--- a/src/widget_type.h
+++ b/src/widget_type.h
@@ -1347,7 +1347,7 @@ constexpr NWidgetPart SetPadding(uint8_t horizontal, uint8_t vertical)
 
 /**
  * Widget part function for setting additional space around a widget.
- * @param r The padding around the widget.
+ * @param padding The padding around the widget.
  * @ingroup NestedWidgetParts
  */
 constexpr NWidgetPart SetPadding(const RectPadding &padding)
@@ -1379,9 +1379,9 @@ constexpr NWidgetPart SetPIP(uint8_t pre, uint8_t inter, uint8_t post)
 
 /**
  * Widget part function for setting a pre/inter/post ratio.
- * @param pre The ratio of space before the first widget.
- * @param inter The ratio of space between widgets.
- * @param post The ratio of space after the last widget.
+ * @param ratio_pre The ratio of space before the first widget.
+ * @param ratio_inter The ratio of space between widgets.
+ * @param ratio_post The ratio of space after the last widget.
  * @ingroup NestedWidgetParts
  */
 constexpr NWidgetPart SetPIPRatio(uint8_t ratio_pre, uint8_t ratio_inter, uint8_t ratio_post)
@@ -1430,6 +1430,7 @@ constexpr NWidgetPart NWidget(WidgetType tp, Colours col, WidgetID idx = INVALID
  * Widget part function for starting a new horizontal container, vertical container, or spacer widget.
  * @param tp         Type of the new nested widget, #NWID_HORIZONTAL, #NWID_VERTICAL, #NWID_SPACER, #NWID_SELECTION, and #NWID_MATRIX.
  * @param cont_flags Flags for the containers (#NWID_HORIZONTAL and #NWID_VERTICAL).
+ * @param idx Optional identifier of the widget.
  * @ingroup NestedWidgetParts
  */
 constexpr NWidgetPart NWidget(WidgetType tp, NWidContainerFlags cont_flags = {}, WidgetID idx = INVALID_WIDGET)
diff --git a/src/window.cpp b/src/window.cpp
index d73cd1ec25..53f0ae910b 100644
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -1191,6 +1191,7 @@ Window *GetMainWindow()
  * @param cls Window class
  * @param number Number of the window within the window class
  * @param force force closing; if false don't close when stickied
+ * @param data Arbitrary data to pass to the Close function.
  */
 void CloseWindowById(WindowClass cls, WindowNumber number, bool force, int data)
 {
@@ -1203,6 +1204,7 @@ void CloseWindowById(WindowClass cls, WindowNumber number, bool force, int data)
 /**
  * Close all windows of a given class
  * @param cls Window class of windows to delete
+ * @param data Arbitrary data to pass to the Close function.
  */
 void CloseWindowByClass(WindowClass cls, int data)
 {
@@ -2093,6 +2095,7 @@ static void EnsureVisibleCaption(Window *w, int nx, int ny)
  * @param delta_x Delta x-size of changed window (positive if larger, etc.)
  * @param delta_y Delta y-size of changed window
  * @param clamp_to_screen Whether to make sure the whole window stays visible
+ * @param schedule_resize Whether to schedule for resizing (when a Window isn't fully initialised yet), or resize immediately.
  */
 void ResizeWindow(Window *w, int delta_x, int delta_y, bool clamp_to_screen, bool schedule_resize)
 {
@@ -2716,6 +2719,10 @@ void HandleCtrlChanged()
  * Insert a text string at the cursor position into the edit box widget.
  * @param wid Edit box widget.
  * @param str Text string to insert.
+ * @param marked Replace the currently marked text with the new text.
+ * @param caret Move the caret to this point in the insertion string.
+ * @param insert_location Position at which to insert the string.
+ * @param replacement_end Replace all characters from insert_location up to this location with the new string.
  */
 /* virtual */ void Window::InsertTextString(WidgetID wid, std::string_view str, bool marked, std::optional<size_t> caret, std::optional<size_t> insert_location, std::optional<size_t> replacement_end)
 {
@@ -2731,8 +2738,10 @@ void HandleCtrlChanged()
 /**
  * Handle text input.
  * @param str Text string to input.
- * @param marked Is the input a marked composition string from an IME?
+ * @param marked Replace the currently marked text with the new text.
  * @param caret Move the caret to this point in the insertion string.
+ * @param insert_location Position at which to insert the string.
+ * @param replacement_end Replace all characters from insert_location up to this location with the new string.
  */
 void HandleTextInput(std::string_view str, bool marked, std::optional<size_t> caret, std::optional<size_t> insert_location, std::optional<size_t> replacement_end)
 {
diff --git a/src/window_gui.h b/src/window_gui.h
index 20481360ee..db3fb02709 100644
--- a/src/window_gui.h
+++ b/src/window_gui.h
@@ -811,7 +811,8 @@ public:
 
 	/**
 	 * The user clicked on a vehicle while HT_VEHICLE has been set.
-	 * @param v clicked vehicle
+	 * @param begin Begin iterator of the vehicle list.
+	 * @param end End iterator of the vehicle list.
 	 * @return True if the click is handled, false if it is ignored
 	 * @pre v->IsPrimaryVehicle() == true
 	 */