ViewSonic VS17774 User Manual page 29

To adjust the Volume:
1. Press INPUT on the remote control to display the General Setting menu.
2.
Adjust the volume level by using the remote control's directional arrows to select
increase/decrease volume and pressing ENTER.
3. Press (Mute)
4. Press BACK on the remote control to exit.
on the remote control to enable or disable the mute function.
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