Epson EX90 User's Guide - Page 17

Try to place the projector directly in front of the center of the screen, facing it toward the screen squarely. If the projector isn't positioned this way, the image will be "keystone" shaped, instead of square or rectangular. If you place the projector below the level of the screen, you'll have to tilt it up by extending the front adjustable foot, as described on page 38. This also causes the image to lose its rectangular shape. You can adjust the shape using the buttons on the projector (see page 38), or using the projector's menu system (see page 61). The Auto Keystone feature corrects the distortion automatically. See page 62 for more information about Auto Keystone correction. If necessary, you can adjust the image shape manually as described on page 38. note The Auto Keystone feature corrects vertical distortion automatically. For more information, see page 38. Other Installations You can also project from behind the screen or from the ceiling, with the projector mounted upside-down: Rear projection (using a translucent screen) Rear/ceiling projection (using a translucent screen) Front/ceiling projection To project from overhead, you'll need the optional ceiling mount hardware. (See page 14 for ordering information.) You'll also need to select Front/Ceiling or Rear/Ceiling for the Projection option in the Extended menu. To project from the rear, select Rear. See page 63 for more information. Setting Up the Projector 17