Onscreen Display Menu Options; Volume; Brightness - Asus S1 E-Manual

Onscreen display menu options

Volume

Select this menu option to adjust the volume of the audio file played
on your LED projector.
You may adjust the volume on a scale of 0 to 10, from mute to the
loudest possible volume played via your LED projector's built-in
speakers.

Brightness

Select this menu option to adjust the brightness of your projection
onscreen.
You may adjust the brightness on a scale of 0 to 10, from darkest to
brightest.
LED projector E-Manual 33