Acer PD523P - Manual (Page 17)

15 ... English
Installation
Adjusting the Projected Image
Adjusting the Projector Image Height
Elevator Foot 1 2
Elevator Button
The projector is equipped with an elevator foot for adjusting
the image height.
To raise the image:
1. Press the elevator button  .
2. Raise the image to the desired height angle  , then release
the button to lock the elevator foot into position.
To lower the image:
1. Press the elevator button.
2. Lower the image, then release the button to lock the elevator
foot into position.