If the projected image is not evenly rectangular,
try the following solutions:
If the
projector is not mounted on the wall or ceiling, place it directly
in front of the screen, lining up the lens with the center of the
screen, if possible.
Adjust the image shape using the Geometry Correction menu settings.
Note: If the
projector is mounted on the wall, always use the adjustment dials
on the mount to center the image.