VIEWSONIC VS12835 - Manual (Page 40)

Enjoy Life, Enjoy ViewSonic
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․ Power saving —————————————
LCD backlight brightness and off screen timer can be adjusted on the
Power saving screen.
Backlight brightness: Level 5 is at the maximum brightness.
Off Screen Timer: There are seven timer intervals to turn off the display
screen that can be adjusted to save power.
ViewSonic VPD400/VPD500