Optoma EP773 User Manual - Page 27

User Controls Reset Return the adjustments and settings to the factory default values.  Execute: Returns the settings for all menus to factory default values.  Cancel: Cancel the revised settings. Management High Altitude Choose "On" to turn on High Altitude mode. Operates the fans at full speed continuously to allow for proper high altitude cooling of the projector. Volume  Press to decrease the volume.  Press to increase the volume. Treble The treble setting controls the higher frequencies of your audio source.  Press to decrease the treble.  Press to increase the treble. Bass The bass setting controls the lower frequencies of your audio source.  Press to decrease the bass.  Press to increase the bass. Projector ID Allows RS232 control of an individual projector. Range 01-99. 27 English