Shutting Down Your Tablet - Acer Iconia One 8 User Manual

Using your tablet - 21
Security Options
For additional security, you may set a code or number that must be
entered to access the tablet, such as an unlock pattern (a set of dots
that must be tapped in the correct order). Open the Application menu
and tap Settings > Security > Screen lock. If you forget your unlock
pattern, please refer to Unlock pattern on page 48.

Shutting down your tablet

If you won't use your tablet for an extended period of time, turn it off to
save battery power. To turn off your tablet (even when locked), press
and hold the power button until a menu displays (about one second).
Tap Power off and confirm the shut down. To force a shutdown,
press and hold the power button until the tablet shuts down (about
four seconds).