You may find that your projector image has flipped and appears upside down, particularly after setting up your projector for the first time, or after resetting to factory default.

To correct this issue, first press the MENU button on your projector remote control. 

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Using the right arrow button move right until you reach the Language option. Now use the down arrow button to scroll down to the Ceiling option.

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From here, press the SELECT button and the right arrow button to toggle the screen orientation.