Adjusting a slanted picture
If the projector is tilted up or down, the sides of the picture on the screen might slant in or out, even though the top and bottom are level. The keystone adjustment corrects this problem.
Adjust the picture using the keystone setting in the
TIP: If the projector is not perpendicular to the screen, the projected image may slant left or right. If this happens, turn the projector until the image is rectangular, with straight corners.
Adjusting the picture and sound 31