Tap the icon "Backlight" and enter into the following display.
A. Under Backlight icon, tap "-" to weaken the backlight, and tap "+" to stronger the
backlight.
B. Under battery icon, tap < or > button to select the duration of auto power off the
backlight.
C. Under AC power icon, tap <or >to select the duration of auto power off the backlight
when using AC adaptor.
2) System Info
A. Tap the icon “USB” to set the USB working mode.
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