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

### - u -

- ui_count : NewGRFClass< Tspec, Tid, Tmax >
- undelivered_supply : LinkGraphJob::NodeAnnotation
- UndeliveredSupply() : LinkGraphJob::Node
- UnfocusFocusedWidget() : Window
- UnFoldAll() : SettingEntry , SettingsPage
- Uninitialize() : Game , AI
- unique_id : ContentInfo
- unitnumber : Vehicle
- unitnumber_digits : BaseVehicleListWindow
- units_force : LocaleSettings
- units_height : LocaleSettings
- units_per_em : FontCache
- units_power : LocaleSettings
- units_velocity : LocaleSettings
- units_volume : CargoSpec , LocaleSettings
- units_weight : LocaleSettings
- Unload() : VehicleCargoList
- UnloadCount() : VehicleCargoList
- UnmappedChoiceList() : UnmappedChoiceList
- Unpack() : VehicleListIdentifier
- Unpause() : AI , Game , ScriptInstance
- Unqueue() : LinkGraphSchedule
- UnreserveSingleTrack() : CYapfReserveTrack< Types >
- unrestricted : FlowStat
- unsatisfied_demand : LinkGraphJob::EdgeAnnotation
- UnsatisfiedDemand() : LinkGraphJob::Edge
- Unselect() : ClientNetworkContentSocketHandler
- UnselectAll() : ClientNetworkContentSocketHandler
- UNSELECTED : ContentInfo
- UnselectVehicle() : VehicleGroupWindow
- UNSET : GRFTempEngineData
- unshaded_size : Window
- unwanted : Town
- Update() : Backup< T > , LinkGraph::Edge , CargoDataEntry
- update_frequency : ServerNetworkAdminSocketHandler
- UpdateAcceleration() : Train
- UpdateAfterLoad() : GroupStatistics
- UpdateAutoRefitState() : OrdersWindow
- UpdateAutoreplace() : GroupStatistics
- UpdateCache() : Ship
- UpdateCaretPosition() : Textbuf
- UpdateDeltaXY() : Aircraft , EffectVehicle , RoadVehicle , Ship , Train , Vehicle , DisasterVehicle
- UpdateEdge() : LinkGraph::Node
- UpdateFilterState() : SettingEntry , SettingsPage
- UpdateInclination() : GroundVehicle< T, Type >
- UpdateListPos() : NetworkGameWindow
- UpdateMarkedText() : Textbuf
- UpdateMode : LinkGraph
- UpdateNewGRFScanStatus() : ScanProgressWindow
- UpdateOptionWidgetStatus() : BuildRoadToolbarWindow
- UpdateOrderTimetable() : OrderList
- UpdateOskState() : OskWindow
- UpdateOverlayCargoes() : LinkGraphLegendWindow
- UpdateOverlayCompanies() : LinkGraphLegendWindow
- UpdatePalette() : CocoaSubdriver
- UpdatePosition() : ViewportSign , Scrollbar
- UpdatePrevNextDisabledState() : StoryBookWindow
- UpdateProfits() : GroupStatistics
- UpdateRealOrderIndex() : Vehicle
- UpdateRefittability() : GRFTempEngineData
- UpdateSelectionStates() : TimetableWindow
- UpdateSize() : Textbuf
- UpdateSpeed() : RoadVehicle , Train
- UpdateStatistics() : BaseGraphWindow
- UpdateStringIter() : Textbuf
- UpdateSupply() : LinkGraph::Node
- UpdateViewport() : SpecializedVehicle< T, Type >
- UpdateViewportCoordinates() : NWidgetViewport
- UpdateVirtCoord() : BaseStation , Sign , Station , Town , Waypoint
- UpdateVisualEffect() : Vehicle
- UpdateWidgetSize() : LinkGraphLegendWindow , CreateScenarioWindow , NetworkGameWindow , SaveLoadWindow , NetworkJoinStatusWindow , DepotWindow , Window , BuyCompanyWindow , TooltipsWindow , CompanyInfrastructureWindow , QueryWindow , SelectCompanyLiveryWindow , MusicWindow , CheatWindow , NetworkChatWindow , BuildTreesWindow , NetworkStartServerWindow , BuildAirportWindow , NetworkLobbyWindow , AIConfigWindow , NetworkClientListPopupWindow , AIListWindow , NetworkClientListWindow , NewGRFInspectWindow , MusicTrackSelectionWindow , RefitWindow , NewsWindow , TownViewWindow , VehicleViewWindow , StatusBarWindow , BuildRailStationWindow , AboutWindow , GameSettingsWindow , VehicleListWindow , SelectStationWindow< T > , QueryStringWindow , IndustryCargoesWindow , TimetableWindow , ScenarioEditorToolbarWindow , TownAuthorityWindow , TownDirectoryWindow , VehicleGroupWindow , VehicleDetailsWindow , IndustryViewWindow , BaseGraphWindow , StoryBookWindow , CompanyLeagueWindow , SubsidyListWindow , AISettingsWindow , LandInfoWindow , SelectGameWindow , IndustryDirectoryWindow , BuildIndustryWindow , PerformanceRatingDetailWindow , PaymentRatesGraphWindow , GoalQuestionWindow , GoalListWindow , GenerateLandscapeWindow , EnginePreviewWindow , SetDateWindow , CompanyWindow , SelectCompanyManagerFaceWindow , CompanyFinancesWindow , BuildVehicleWindow , AIDebugWindow , BuildSignalWindow , CompanyStationsWindow , ReplaceVehicleWindow , BuildBridgeWindow , StationViewWindow , BuildRailWaypointWindow , CustomCurrencyWindow , GameOptionsWindow , SpriteAlignerWindow , BuildObjectWindow , GenerateProgressWindow , OrdersWindow , NewGRFParametersWindow , MessageHistoryWindow , ScanProgressWindow
- UpdateWidth() : Textbuf
- UpdateZPosition() : GroundVehicle< T, Type >
- UpdateZPositionAndInclination() : GroundVehicle< T, Type >
- upgrade : ContentInfo
- url : GRFConfig , ContentInfo , NetworkHTTPContentConnecter , ScriptInfo
- Usage() : LinkGraph::EdgeWrapper< Tedge >
- usage : LinkGraph::BaseEdge , LinkProperties
- use_as_random : AIInfo
- USE_NEXT : LinkRefresher
- use_password : NetworkGameInfo , NetworkCompanyInfo
- UseAsRandomAI() : AIInfo
- used_liveries : GRFLoadedFeatures
- used_set : BaseMedia< Tbase_set >
- UsePaletteAnimation() : Blitter_32bppAnim , Blitter_8bppBase , Blitter_Null , Blitter_32bppBase , Blitter
- user : OrderBackup
- user_def_data : RailVehicleInfo , TrainCache
- UserIsAllowedToChangeNewGRFs() : GUISettings
- UsesSmoothEconomy() : IndustrySpec
- UseTextRefStack() : CommandCost
- utf16_str : IcuStringIterator
- utf16_to_utf8 : IcuStringIterator