Epson 5020UB - Manual (Page 26)

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Setting Up the Projector
Positioning the Image
If the projector is not centered in front of the screen, use the lens shift dials and, if needed,
vertical keystone buttons to correct the position and shape of the image.
Note: For the best image quality, try to position the projector so that you do not need to use
keystone correction.
Note: You can display a test pattern to help adjust the image position by pressing the Pattern
button on the remote control. Press the Esc button to turn off the test pattern.
Vertical lens shift dial
Horizontal lens shift dial
Vertical keystone
buttons