LG CineBeam PF510QC Owner's Manual page 54

[Keystone]
(Q. Settings) →
• [Auto Keystone]
[Auto Keystone] provides a rectangular screen image by automatically adjusting
the keystone number when there is a trapezoidal screen image caused by tilting
of the projector. Automatically adjusts the keystone number.
• [Keystone]
To prevent the screen image from becoming trapezoidal, Keystone adjusts the
top and bottom width of the image if the projector is not set at a right angle to
the screen.
•
Some models may not be supported.
([Installation Wizard]) → [Keystone]
11