Here is a list of all documented struct and union fields with links to the struct/union documentation for each field:

### - l -

- l_volume : Units
- l_weight : Units
- label : GRFFile , RailtypeInfo , CargoSpec
- labels : ScriptConfigItem
- lag_test : ServerNetworkGameSocketHandler
- lan_internet : NetworkSettings
- land_generator : GameCreationSettings
- LAND_INFO_CENTERED_LINES : LandInfoWindow
- LAND_INFO_MULTICENTER_LINE : LandInfoWindow
- LandInfoLines : LandInfoWindow
- landscape : LoggedChange , GameCreationSettings
- langid : GRFText
- LangString() : LangString
- language : LanguageStrings
- language_map : GRFFile
- LanguageFileWriter() : LanguageFileWriter
- LanguageScanner() : LanguageScanner
- LanguageStrings() : LanguageStrings
- large_turn : AccelerationSlowdownParams
- larger_town : Town
- larger_towns : EconomySettings
- last : CommandQueue
- Last() : Vehicle , SpecializedVehicle< T, Type >
- last_age : GoodsEntry
- last_array_index : SaveLoadParams
- last_build_coordinate : CompanyProperties
- last_cargo_accepted_at : Industry
- last_clicked : GameSettingsWindow
- last_clicked_widget : BuildDocksToolbarWindow
- last_command_res : ScriptStorage
- last_component : GoodsEntry
- last_cost : ScriptStorage
- last_error : ScriptStorage
- last_filtering : NetworkContentListWindow , NewGRFWindow
- last_foundation_child : ViewportDrawer
- last_frame : NetworkGameSocketHandler
- last_frame_server : NetworkGameSocketHandler
- last_group : IniLoadFile
- last_host : NetworkSettings
- last_item : IniGroup
- last_joined : NetworkGameWindow
- last_loading_station : Vehicle
- last_month_pct_transported : Industry
- last_month_production : Industry
- last_month_transported : Industry
- last_name : ScanProgressWindow
- last_newgrf_count : GUISettings
- last_packet : NetworkGameSocketHandler
- last_port : NetworkSettings
- last_prod_year : Industry
- last_size : BuildBridgeWindow
- last_sorting : BuildBridgeWindow , NetworkContentListWindow , NewGRFWindow
- last_speed : GroundVehicleCache , GoodsEntry
- last_started_action : BuildRoadToolbarWindow , MainToolbarWindow , ScenarioEditorToolbarWindow
- last_station_visited : Vehicle
- last_token : ServerNetworkGameSocketHandler
- last_token_frame : ServerNetworkGameSocketHandler
- last_user_action : BuildRailToolbarWindow , TerraformToolbarWindow , ScenarioEditorLandscapeGenerationWindow
- last_value : ResolverObject
- last_vscroll_pos : AIDebugWindow
- lastActivity : ClientNetworkContentSocketHandler
- LastTypeId() : DumpTarget
- lateness_counter : BaseConsist
- layout : AirportFTAClass , AirportScopeResolver , Airport , Town , SpotData
- lc : GenWorldInfo
- Leave() : RoadStop::Entry , RoadStop
- LeaveStation() : Vehicle
- left : Blitter::BlitterParams , ParentSpriteToDraw , ViewPort , NWidgetPartPaddings , Window
- left_align : CargoesField
- left_mouse_btn_scrolling : GUISettings
- LEFT_OFFSET : NewGRFInspectWindow
- legend : LegendAndColour
- LEGEND_BLOB_WIDTH : SmallMapWindow
- len : GRFText
- Length() : SmallVector< T, S > , SmallArray< T, B, N > , CBinaryHeapT< T > , ByteBlob , FixedSizeArray< T, C > , ClientNetworkContentSocketHandler , SettingEntry , SettingsPage
- length : ExpensesList , CompanyManagerFaceBitsInfo , RoadStop::Entry , SaveLoad
- LengthRef() : ByteBlob
- level : SettingEntry
- Lex() : Lexer
- Lexer() : Lexer
- lf : SaveLoadParams
- life_type : IndustrySpec
- lifelength : EngineInfo
- lighthouse : ExtraPaletteValues
- line : LangString
- line_height : TextfileWindow , BuildRailStationWindow , CompanyLeagueWindow , AIListWindow , AISettingsWindow , AIConfigWindow , IConsoleWindow , AboutWindow , NewGRFParametersWindow , BuildObjectWindow
- line_reverse_mode : DifficultySettings
- lines : LanguageStrings , TextfileWindow , NWidgetPartTextLines
- LINK_COLOURS : LinkGraphOverlay
- link_stats : GoodsEntry
- link_terraform_toolbar : GUISettings
- linkgraph : GameSettings
- LinkGraph() : LinkGraph
- LinkGraphComponent() : LinkGraphComponent
- LinkGraphJob() : LinkGraphJob
- LinkGraphOverlay() : LinkGraphOverlay
- LinkStat() : LinkStat
- list : RefitWindow , DropdownWindow , Vehicle
- list_group_names : IniLoadFile
- list_iter : MultiMapIterator< Tmap_iter, Tlist_iter, Tkey, Tvalue, Tcompare >
- list_pos : NetworkContentListWindow , NetworkGameWindow
- list_valid : MultiMapIterator< Tmap_iter, Tlist_iter, Tkey, Tvalue, Tcompare >
- ListColumns : VehicleGroupWindow
- Listen() : NetworkAddress , TCPListenHandler< Tsocket, Tfull_packet, Tban_packet > , NetworkUDPSocketHandler
- liveries : GUISettings
- Load() : ScriptInstance , Game , AI
- Load_BKOR : OrderBackup
- load_check_proc : ChunkHandler
- load_proc : ChunkHandler
- load_unload_ticks : Vehicle
- Load_VEHS : Order
- LoadCompatibilityScripts() : ScriptInstance
- LoadDummyScript() : AIInstance , GameInstance , ScriptInstance
- loaded : RealSpriteGroup
- loaded_at_xy : CargoPacket
- LoadedAtXY() : CargoPacket
- LoadEmpty() : ScriptInstance
- LoadFile() : Squirrel
- LoadFilter() : LoadFilter
- LoadFromDisk() : IniLoadFile
- loading : RealSpriteGroup
- loading_indicators : GUISettings
- LoadObjects() : ScriptInstance
- LoadOldVehicle : Vehicle
- LoadReserved() : VehicleCargoList
- LoadScript() : Squirrel
- LoadSprite() : SpriteLoaderGrf , SpriteLoader
- LoadTextfile() : TextfileWindow
- local_id : GRFFilePropsBase< Tcnt >
- locale : GameSettings
- localidx : StationSpecList
- location : Industry , Object
- location_of_HQ : CompanyProperties
- log_data : ScriptStorage
- LogCompiler() : CrashLog
- LogConfiguration() : CrashLog
- LogError() : CrashLogUnix , CrashLog , CrashLogWindows , CrashLogOSX
- LogGamelog() : CrashLog
- LogLibraries() : CrashLog
- LogModules() : CrashLogWindows , CrashLog
- LogOpenTTDVersion() : CrashLog
- LogOSVersion() : CrashLog , CrashLogUnix , CrashLogOSX , CrashLogWindows
- LogRegisters() : CrashLogWindows , CrashLog
- LogStacktrace() : CrashLogUnix , CrashLogWindows , CrashLog , CrashLogOSX
- longname : OptionData
- LookupColourInPalette() : Blitter_32bppAnim , Blitter_32bppBase
- Loop() : AyStar
- LoopProc : NetworkAddress
- loops_per_tick : AyStar
- lost_vehicle_warn : GUISettings
- LowerWidget() : Window
- lowest : ValuesInterval
- lowest_randbit : RandomizedSpriteGroup
- lowest_value : SnowLine
- lzma : LZMALoadFilter , LZMASaveFilter
- LZMALoadFilter() : LZMALoadFilter
- LZMASaveFilter() : LZMASaveFilter
- LZOLoadFilter() : LZOLoadFilter
- LZOSaveFilter() : LZOSaveFilter