Proxima ASA Multimedia LCD Projectors - Manual (Page 39)

2–24 • User’s Guide
Chapter 2 • Detailed Setup
Correcting Keystoning
The normal projected image will have a rectangular shape.
Keystoning is when the projected image becomes trapezoidal.
Normal Image Keystoned Image
Figure 2-19
Normal vs. keystoned images
Keystoning occurs when the front of the Desktop Projector is not
perpendicular to the projection screen (the vertical plane) or when
it’s not placed parallel to the floor (the horizontal plane). Key-
stoning also occurs when the projector is tilted sideways.
To correct keystoning, always make sure that the projector is at a
right angle to the screen in the horizontal plane. The projector is
properly aligned if the top and bottom of the projected image are
equal in length and parallel to the floor.