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 center of the screen, facing it squarely, if
possible.
If you
adjusted the projector height using the projector feet, press the
keystone buttons on the projector to adjust the image shape.
(BrightLink Pro 1420Wi)
Adjust the
Quick Corner or Keystone setting to correct the image shape.
Note: Adjusting
Quick Corner and Keystone settings may affect focus and pen
calibration.