Optoma TW675UST-3D User Manual page 39

Rear-Ceiling

When selected, the image will appear reversed in upside down
position.
Menu Location
Choose the menu location on the display screen.
Projector ID
ID definition can be set up by menu (range 0~99), and allow user
control an individual projector by RS232. Refer to page 81~85 for
the complete list of RS232 commands.
Mute
Choose the "On" to turn mute on.

Choose the "Off" to turn mute off.

User Controls
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