https://learn.microsoft.com/en-us/dotnet/api/system.windows.uielement3d.previewtouchdownevent?view=netframework-4.8
UIElement3D.PreviewTouchDownEvent Field (System.Windows) | Microsoft Learn
Identifies the PreviewTouchDown routed event.
field systemwindowsmicrosoftlearn
https://help.syncfusion.com/cr/uwp/Syncfusion.UI.Xaml.Charts.UIElement3D.html
Class UIElement3D - UWP API Reference | Syncfusion
Used to plot any UIElement in 3D view.
api referenceclassuwpsyncfusion