LG CineBeam Laser 4K Owner's Manual page 127

74
[PJT Mode]
(Q. Settings)
This function turns the projected image upside down or flips horizontal.
[Keystone]
(Q. Settings)
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.
[General] [PJT Mode]
[General] [Keystone]