Pyle PRJ3D99TU Manual page 35

2.Then sharpen the image by turning the lens.
Note:
Note: Note: Note:
● When you turn the lens to sharpen the image, the image size will be
changed a little. You can move the projector forward or backward
slightly to get the optimal image size.
Correcting keystone
Correcting Correcting keystone Correcting keystone keystone
Keystoning occurs when the projector is not perpendicular to the
screen and is where the projected image displays visible as a
trapezoid shape like the following:
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