1. Press "Projector Controls" > "AV Mute"
Tip: Selected buttons will turn BLUE
2. To unmute the projector, press "AV Mute" again
Tip: Buttons NOT selected turn BLACK
If the guide didn't provide the support you required or you are still having issues, please contact CDM AV Support at cdmavsupport@depaul.edu or call (312)-362-1297.