Epson 100" EpiqVision Ultra LS500 4000-Lumen Pixel-Shift 4K UHD 3LCD Laser Projector TV System with 100" Screen (White Projector) - Manual (Page 63)

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2. Rotate the front feet to adjust any tilting or vertical distortion.
If the projected image is unevenly rectangular, you need to adjust the image shape.
Parent topic: Using Basic Projector Features
Image Shape
You can project an evenly rectangular image by placing the projector directly in front of the center of the
screen and keeping it level. If you place the projector at an angle to the screen, or tilted up or down, or off
to the side, you may need to correct the image shape for the best display quality.
Correcting Image Shape with Quick Corner
Correcting Image Shape with the Keystone Buttons
Parent topic: Using Basic Projector Features
Correcting Image Shape with Quick Corner
You can use the projector's Quick Corner setting to correct the shape and size of an image that is
unevenly rectangular on all sides.
Note: To provide the best possible image quality, adjust the projector's position to correct the image
shape. If this isn't possible, use the Quick Corner setting to correct the image shape.