Issue description
You might find yourself stuck in one perspective in the 3D workspace and you are unable to orbit or move in 3D.
Solution
1. Go to a Floorplan viewpoint
2. Use the Camera tool to place a camera randomly somewhere on the floorplan.
3. Select the placed camera so it is highlighted
4. Right-click and choose "Show Selection/Marquee in 3D"
5. This will take you to the 3D Window and should allow you to now move in 3D and orbit.
6. Return to Floorplan and delete the placed camera.
7. Returning to 3D should still allow navigation.