ViewSonic VS18454 - Settings - HDMI & VGA Input Source; Audio Settings

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Sengs - HDMI & VGA Input Source
Press MENU
source in Input Sengs to launch the SengsAudio,
Screen, Display, and Adjust.
Audio Sengs
1. Press q on the remote control and select the Audio menu.
2. Press q/p/t/u
3. 
each value, or with the remote control by pressing 
4. Touch the Mute slider directly to enable/disable mute, or press on the
remote control.
5. Press on the remote control, or touch a blank area outside of the menu to
exit.