Acer XD1250D series - Manual (Page 33)

User Controls
31 ... English
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.
 Audio menu is for
XD1150D/XD1250D.