Epson Pro L30002UNL 30,000-Lumen HDR Pixel-Shift DCI 4K Laser 3LCD Large Venue Projector (White) - Manual (Page 147)

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9. Adjust the projector's position and use lens shift to center the image over the point where the two
surfaces meet. (The rest of these steps show Horizontal Corner as the selected Corner Type but the
steps are the same for Vertical Corner.)
Note: You can press Enter to show or hide the image and grid to check the results.