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

### - u -

- uninit_read : SaveLoadFormat
- uninit_write : SaveLoadFormat
- units : LocaleSettings
- units_volume : CargoSpec
- unshaded_size : Window
- UnshareOrders() : AIOrder
- UpdateOrderTimetable() : OrderList
- UpdatePosition() : ViewportSign , Scrollbar
- UpdateViewportCoordinates() : NWidgetViewport
- UpdateVirtCoord() : BaseStation , Station
- UpdateWidgetSize() : BuildTreesWindow , SelectStationWindow< T > , StationViewWindow , VehicleDetailsWindow , AIDebugWindow , NewsWindow , NewGRFWindow , NewGRFAddWindow , QueryWindow , QueryStringWindow , TooltipsWindow , ErrmsgWindow , OrdersWindow , BuildIndustryWindow , CompanyStationsWindow , CompanyWindow , VehicleListWindow , SelectCompanyLiveryWindow , ReplaceVehicleWindow , CompanyFinancesWindow , TownAuthorityWindow , AIConfigWindow , AISettingsWindow , AIListWindow , IndustryDirectoryWindow , SetDateWindow , RefitWindow , SelectCompanyManagerFaceWindow , TownDirectoryWindow , Window , VehicleViewWindow
- use_left_mouse_button : TooltipsWindow
- used : AILog::LogData
- used_set : BaseMedia< Tbase_set >
- UsePaletteAnimation() : Blitter