Display the model and background over the entire screen without any interface elements.
Marking menus, hotkeys and camera manipulations (through Alt-Shift) can still be used in borderless display mode.
Press the
key to return to the conventional
display.
The option box allows you to turn on or off selected parts of the interface. The options are:

This option is ON by default. Menus, title bar, prompt line and layer bar are hidden.
This option is ON by default. The Windows title bar is hidden, as are the individual view window title bars.
This option is ON by default. The tool palette, shelves, control panel and title bar are hidden.