SpaceMouse
Target Camera Mode
The SpaceMouse cap controls the viewport (camera) in the context of what you are looking at (the target). You will orbit around what you are looking at (the center of your view).
Example:
Push the cap forward and your view moves into the scene. Push left and your view moves to the left. Twist the cap in any direction and your view will orbit around the view center.
Rotation Lock
Manually toggles rotations On / Off.