Rear Ceiling. In this mode, the projector is placed behind the screen with the lens upside down. This mode allows you to flip the image over. A compatible screen which supports rear
projection will be required.
Front Ceiling, which flips the image over top-to-bottom to project upside-down from a ceiling or wall mount.
Note:
Wherever you set up the projector, make sure to position it squarely in front of the center of the screen or the wall, not at an angle, if possible.
Projection Distance and Size
The distance at which you place the projector from the screen determines the approximate size of the image. The projection size increases when the projector is farther from the screen.
Locate the projector at an appropriate position, then adjust the focus ring and Keystone manually to get the best image performance.