3PLUS HR Owner's Manual page 25

Flip screen
This function allows you to choose the screen orientation
that is best suited for you.
Once you confirm the flip, your screen will rotate 180°.
Restart
Restarting allows you to restart your device without
having to erase your current data.
To restart your device, enter the "restart" option at the
settings menu.
Tap the check mark to confirm.
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