Log out (and leave the system running), restart or shut down the computer.
Click the button on your panel and select +. This ends your session but leaves the system running. To start a parallel session as a different user, select + instead.
Click , then select one of the following options:
Logs you out of the current session, then turns off the computer.
Pauses your current session without logging out. Your computer consumes very little power, but can be brought back to fully-functional status very quickly.
Suspends your session, using no power until the computer is restarted. The state of your session is preserved, however, including all applications you have running and all documents you have open.
Restarts your computer.