VIEWSONIC ViewBoard IFP8662 86" 4K Interactive Display - Manual (Page 41)

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Settings - HDMI & VGA Input Source
Press MENU on the remote control or select the setting icon next to the input
source in Input Settings to launch the Settings menu. Settings include: Audio ,
Screen , Display , and Adjust .
Audio Settings
1. Press q on the remote control and select the Audio menu.
2. Press q / p / t / u on the remote control or directly touch the option to select it.
3. Adjust the Volume, Bass, Treble, and Balance directly by touching and adjusting
each value, or with the remote control by pressing ENTER to adjust the option.
4. Touch the Mute slider directly to enable/disable mute, or press (Mute) on the
remote control.
5. Press EPG/BACK on the remote control, or touch a blank area outside of the
menu to exit.