20English Audio3DVolume • Press to decrease the volume.• Press to increase the volume.Mute • Choose "On" to mute the volume.• Choose "Off" to restore the volume.Alarm Volume • Select this function to adjust the volume of any warningnotifications.3D Choose "On" to enable DLP 3D function.• On: Choose this item while using DLP 3D glasses, quadbuffer (NVIDIA/ATI...) graphic card and HQFS format file orDVD with corresponding SW player.• Off: Turn off 3D mode.3D Sync Invert If you see a discrete or overlapping image while wearing DLP 3Dglasses, you may need to execute "Invert" to get best match ofleft/right image sequence to get the correct image (for DLP 3D).