Determines which controls are available in the hotbox.
You can use the MEL command:
hotBox -ncc "";
to disable the viewport panel toggle that occurs when you press the space bar. This way, only the hotbox appears when you press the space bar.
For more information, see hotBox in the MEL Commands documentation.
Make all of the menu rows visible.
Display just the five marking menu zones. Menu sets are not available.
Make only the center zone (Maya) active everywhere. North, South, East, and West Zones and menu sets are not available.
Turn this option on to display menus for the selected menu set when you right-click the center zone. The menu set appears as a pop-up instead of a row. Note that the functional menu sets do not display when this option is on, even if you have selected to show them.