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

### - l -

- label : CargoSpec , GRFFile , RailtypeInfo
- land_generator : GameCreationSettings
- landscape : LoggedChange , GameCreationSettings
- larger_towns : EconomySettings
- Last() : SpecializedVehicle< T, Type >
- last_array_index : SaveLoadParams
- last_available : AirportFTAClass
- last_cargo_accepted_at : Industry
- last_command_res : AIStorage
- last_cost : AIStorage
- last_error : AIStorage
- last_foundation_child : ViewportDrawer
- last_group : IniFile
- last_item : IniGroup
- last_month_pct_transported : Industry
- last_month_production : Industry
- last_month_transported : Industry
- last_prod_year : Industry
- last_sorting : NewGRFAddWindow
- LastTypeId() : DumpTarget
- layout : AirportFTAClass , SpotData
- Leave() : RoadStop::Entry , RoadStop
- left : Window , ParentSpriteToDraw , ViewPort , NWidgetPartPaddings
- left_mouse_btn_scrolling : GUISettings
- legend : LegendAndColour
- LEGEND_BLOB_WIDTH : SmallMapWindow
- length : ExpensesList , CompanyManagerFaceBitsInfo , RoadStop::Entry , SaveLoad , RefitWindow
- Length() : SmallVector< T, S > , SettingEntry , SettingsPage
- level : SettingEntry
- LevelTiles() : AITile
- Lex() : Lexer
- Lexer() : Lexer
- life_type : IndustrySpec
- lighthouse : ExtraPaletteValues
- line_reverse_mode : DifficultySettings
- lines : AILog::LogData , NWidgetPartTextLines
- link_terraform_toolbar : GUISettings
- list : RefitWindow , NewGRFWindow , DropdownWindow
- List : CargoList< Tinst >
- list_group_names : IniFile
- liveries : GUISettings
- loaded_at_xy : CargoPacket
- LoadedAtXY() : CargoPacket
- LoadedLibrary() : AIController
- LoadFromDisk() : IniFile
- loading_indicators : GUISettings
- local_id : GRFFileProps
- locale : GameSettings
- Log() : AILog
- log_data : AIStorage
- LOG_ERROR : AILog
- LOG_INFO : AILog
- LOG_SQ_ERROR : AILog
- LOG_SQ_INFO : AILog
- LOG_WARNING : AILog
- LogConfiguration() : CrashLog
- LogError() : CrashLogOSX , CrashLog , CrashLogWindows , CrashLogUnix
- LogGamelog() : CrashLog
- LogLibraries() : CrashLog
- LogModules() : CrashLog , CrashLogWindows
- LogOpenTTDVersion() : CrashLog
- LogOSVersion() : CrashLog , CrashLogUnix , CrashLogOSX , CrashLogWindows
- LogRegisters() : CrashLogWindows , CrashLog
- LogStacktrace() : CrashLogUnix , CrashLogWindows , CrashLog , CrashLogOSX
- longbridges : ConstructionSettings
- lost_train_warn : GUISettings
- LowerTile() : AITile
- LowerWidget() : Window
- lowest_value : SnowLine