LG LGAS876 - Manual (Page 168)

168 Settings
Daydream
Tap the Daydream switch to toggle it On or Off. Turning this feature
on allows the set screensaver to be displayed when the phone is sleeping
while docked and/or charging. Choose Clock or Google Photos.
Font type
Sets the type of font used for the phone and menus.
Font size
Sets the size of the font displayed in the phone and menus.
Smart screen
Checkmark to keep the screen from timing-out when the device detects
your eyes looking at the screen.
Smart video
Checkmark to pause video playback when it doesn't detect your eyes
looking at the screen.
Front touch key light
Sets whether or not the Touch Keys (below the touchscreen) are
illuminated and how long they will stay lit.
Home button LED
Tap the switch to toggle it On or Off. Turning this feature on will
activate the LED light on the Home Key for the notifications you
select, in the color you set for each one. Use the slider bar at the top of
the screen to set the LED brightness.
General
Gestures
Screen on/off: Checkmark to allow the phone to turn the screen on and off
by double-tapping the screen. Quickly double-tap center screen to turn it on.