Setup - Optoma EP1690 User Manual

User Controls
Language
Choose the multilingual OSD menu. Press
and then use the
"Select (Enter)" to finalize the selection.
Projection
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Display Type
Choose the display type as 16:9 (1280 x 720 ) or 16:10 (1280 x 768 ).
English 2
or key to select your preferred language. Press
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.
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Setup

or into the sub menu