Editor improvements: dragging scenes to viewport, undo for gizmos, better docs
You can now drag scene files (like glTF, X3D, images...) from the "Files" bottom panel onto a viewport. It will automatically create a TCastleScene instance with proper URL that displays this model.

The initial translation is determined by the point where you drop the item, with some smart
https://castle-engine.io/wp/2020/12/20/editor-improvements-dragging-scenes-to-viewport-undo-for-gizmos-better-docs/