You can either setup 3d space on a slide or a panel layer.
A. Setup 3d space for a panel layer. Select a panel layer, set 3D Space Perspective -> Depth property.
This way is recommended, it will isolate 3d space from any other 3d spaces.
B. Setup 3d space for a slide. Select a slide, set 3D Space Perspective -> Depth property.
Any child layer inside a 3d space can play 3d transition, set 3d motion properties Rotate X (3d), Rotate Y (3d), Translate Z (3d) to achieve the goal.
In addition, you can set 3D Space Perspective -> X,Y property for a panel layer's 3d space,
or a slide's 3d space.