Optoma Home Theatre Projector - Manual (Page 47)

User Controls
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 Off: When Off is selected, the image becomes brighter.
 On: When On is selected, black levels of the image are
reproduced with more clarity though the brightness is lowered.
There are 16 step for you adjust.
 Auto: The dynamic image performance manager is active
in making sure your greatest pleasure from seeing a movie
dynamically with the most dark details revealed, vivid and
bright image performed all the way.
Projection
 Front-Desktop
The factory default setting.
 Rear-Desktop
When you select this function, the projector reverses the image
so you can project behind a translucent screen.
 Front-Ceiling
When you select this function, the projector turns the image
upside down for ceiling-mounted projection.
 Rear-Ceiling
When you select this function, the projector reverses and turns
the image upside down at same time. You can project from
behind a translucent screen with ceiling mounted projection.
V Keystone
Press the or to adjust image distortion vertically and makes a
squarer image.
Brite Mode
Choose “On” to increase the brightness. Choose “Off” to return
normal mode.
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.