Sony 76c - Manual (Page 17)

Setting Up the Projector 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 be keystone shaped, instead of
square or rectangular. To adjust the keystone correction value,
see page 39.
Other Installations
You can also project from behind the screen or from the ceiling, with
the projector mounted upside-down:
To project from overhead, you’ll need the optional ceiling mount
hardware. (See page 13 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 60 for
more information.
Front/ceiling projection Rear projection (using a
translucent screen) Rear/ceiling projection (using
a translucent screen)