Adjusting The Projector Zoom / Focus; Adjusting Projected Image Size - Acer PD523P series Manual

Installation
16
English ...

Adjusting the Projector Zoom / Focus

You may turn the zoom ring to zoom in or out. To focus the image,
rotate the focus ring until the image is clear. The projector will focus
at distances from 5 to 40 feet (1.5 to12.2 meters)
.
Adjusting Projection Image Size
Screen
(Diagonal)
Screen
Size
Distance
This graph is for user's reference only.

Zoom Ring
Focus Ring