User`s guide

50 Displaying and Adjusting the Image
3. If the image is tilted or you need to fine-tune the height of the
image, you can turn the projector’s adjustable rear feet.
4. Raising the projector may cause the image shape to distort or
“keystone,” but you can correct the shape as described below.
Adjusting the Image Shape
You can maintain a rectangular image by placing the projector directly
in front of the screen and keeping it level. This also produces the best
picture quality. If the projector is tilted up or down (up to 30°), or
placed at an angle, the shape may “keystone” and you may need to
correct the image shape.
The PowerLite X10+ and PowerLite W10+ projectors include an
Auto Keystone function that detects and corrects vertical keystone
distortion. It takes about one second after the projector starts for the
image to be corrected.