Adjust Full Screen Settings
You can customize how Windows appears and behaves when in Full Screen mode.
To access Full Screen settings:
Choose the Full Screen Mode You Want to Use
By default, Parallels Desktop is configured to use the Mac OS X Lion's native Full Screen. When you switch Windows to this mode, it becomes displayed on a separate Desktop (Space). If you have two displays connected to your Mac and switch Windows to the native Full Screen, Windows becomes available on the primary display. The other is grayed out. To make both displays show Windows, select Use all displays in full screen.
You can also work with Windows in the Mac OS X Snow Leopard-style Full Screen. When you switch Windows to this mode, it occupies the screen but remains on the same Desktop (Space). If you have two displays connected to your Mac and switch Windows to the Snow Leopard-style Full Screen, you can either configure both displays to show Windows (select Use all displays in full screen) or work with Windows on one display and Mac OS X on the other. To use this type of Full Screen, clear Use Mac OS X Full Screen.
Set Actions for Screen Corners
Parallels active screen corners allow you to exit Full Screen, display the Mac OS X menu bar and Dock.
If you're using Mac OS X Lion, Parallels active screen corners are disabled by default. If you want to use Parallels active screen corners instead of Mac OS X hot corners, select Active Screen Corners.
To set which action is performed for a screen corner, select one of the following from the menu near that corner:
Note: If you're using Mac OS X Snow Leopard or Mac OS X Leopard and active screen corners such as Expose or Screen Saver are set in Mac OS X preferences, those settings take precedence over Full Screen mode active screen corner settings. You must deactivate Mac OS X active screen corners to enable Full Screen mode active screen corners. See Mac Help for more information.
Scale to fit screen
Using the Scale to fit screen menu, you can configure how Windows is displayed when working in Full Screen:
Using All Displays in Full Screen
If you have multiple displays connected to your Mac, you can set Windows to occupy all of the displays when set to Full Screen mode:
Note: To prevent unauthorized changes to Full Screen settings, click the Lock icon at the bottom of the window. Once locked, an administrator's password is required to make further changes.