When using your projector for the first time, or following a factory reset, you may find that the projected image is upside down.

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

User-added image
 

Using the black arrow keys, scroll to the right until you reach Installation I.

User-added image
 

Using the down arrow key, scroll through the options until you reach Projection, now press the right arrow key several times to flip the display horizontally or vertically. Continue pressing the right arrow key until the image is displayed correctly.