Option to constrain boundaries

[1j01]

trafficstars

Since moving your head around is not an exact science, it's useful to be able to limit mouse movement to configurable boundaries.

• Visually editing boundaries would be easier than entering numerical offsets from the screen edges.
• While editing the constraints, the constraints should be disabled.
• Also it would be good to have a way to get out of the constraints, with a gesture, like opening your mouth.