The image is not rectangular. What should I do?

• If the image looks like or , the projector has been placed off to one side of the screen and angled toward it. Face the projector straight ahead (instead of at the center of the screen), then use the horizontal lens shift dial to center the image. See Positioning the Image.
  
  If the image looks like or , make sure the projector is not tilted up or down. Use the vertical lens shift dial to position the image.