LG D959 - Manual (Page 120)

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Brightness
Adjust the screen brightness by using the slider. Tap Auto to set the brightness
to automatically change.
Screen timeout
Set the time delay before the screen automatically turns off.
Screen-off effect
Set the screen off effect used when the screen turns off.
Auto-rotate screen
Set to switch orientation automatically when you rotate the phone.
Screen mode
Set the screen mode. Choose from Standard, Vivid, or Natural.
Daydream
Select the screensaver to display when the phone is sleeping while docked
and/or charging.
Font type
Select the desired font type.
Font size
Select the desired font size.
Smart screen
Checkmark this to keep screen on when the phone detects your face looking
at the screen.
Smart video
Checkmark this to pause videos while playing automatically when the phone
detects you are not looking at the screen.