hotbox

While considering various toolbar setups I remembered Maya's hotbox feature.
While you hold down the space bar a menu (hotbox) appears in the graphics view.
http://courses.cs.washington.edu/courses/cse459/10wi/reading/images/spacebar/01-spacebar.jpg
You can customize what appears in this hotbox.
The value is that you can have the graphics view be full screen (no menus or toolbars).