When you perform live, you can use either Perform in Full Screen or Perform in Window, depending on which you prefer. Each offers some advantages for different performance situations. If you want to view the workspace at maximum size on your display and do not need to access the Finder or the toolbar, use Perform in Full Screen. If you need to access other applications or access buttons in the toolbar, use Perform in Window.
Do one of the following:
Choose View > Perform in Full Screen (or press Command-4).
Click the Perform button in the toolbar.
Note: By default, the Perform button opens the workspace in full screen. For information about changing this preference (in MainStage > Preferences > Display), see Display preferences.
Do one of the following:
Press the Escape (Esc) key.
Click the circled “X” in the upper-left corner of the screen.
Use the key command for one of the other modes (Command-1 through Command-3).
Choose View > Perform in Window (or press Command-3).
In Perform mode (both Perform in Window and Perform in Full Screen), Time Machine backups are disabled automatically. This avoids any impact on your performance.