Epson BrightLink 1485Fi 5000-Lumen Pixel-Shift Full HD Ultra-Short Throw 3LCD Interactive Laser Projector - Manual (Page 231)

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6. Touch and hold the center of the circle with your finger until the circle disappears and another circle
appears, then release it.
The circle disappears, and you see another circle below the first one.
Note: For the most accurate calibration, make sure you touch the center of the circle with the tip of
your finger.
Note: Make sure you are not blocking the signal between your finger and the interactive receiver
(next to the projector lens).
7. Touch the center of the next circle with your finger and continue until all of the circles disappear.