I am using the UIAPI sample from the 2020 SDK to look at how the PreviewControl works with a 3D perspective view.
In the normal Revit perspective view, when you click on the Navigation Wheel icon, the wheel appears on the cursor to give you access to Orbit, Walk, Pan, etc.
In the PreviewControl window for the same view, the Navigation Wheel does not appear after clicking on the icon
See screencast at https://knowledge.autodesk.com/community/screencast/9e6c40e4-d02d-4f24-9b49-958f1aa8a075
