Adjusting The Projector Zoom/Focus; Adjusting Projection Image Size - Acer PD721 User Manual

Xga single chip 0.7” dlp projector
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Installation
Adjusting the Projector Zoom / Focus
You may adjust zoom ring to zoom in / out. Rotate the zoom ring
counter-clockwise to zoom in and clockwise to zoom out. To
focus the image, rotate the focus ring until the image is clear. The
projector will focus at distances from 3.74 feet to 32.81 feet (1.14m
to 10.00m)

Adjusting Projection Image Size

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