Acer PD523P - Manual (Page 31)

29 ... English
User Controls
Audio
(Computer / Video
Mode)
Volume

Press the to decrease the volume.

Press the to increase the volume.
Mute

Choose the “On” to turn mute on.

Choose the “Off” to turn mute off.
Power On/Off Volume
Choose this function to adjust volume when power on/off.
Alarm Volume
Choose this function to adjust volume when there are errors of the
projector.