Acer Projector - Manual (Page 22)

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User Controls
Keystone
Adjust image distortion caused by tilting projection. (±16 degrees)
Aspect Ratio
Use this function to choose your desired aspect ratio.

Auto : Keep the image with original width-higth ratio and maxi
mize the image to fit native horizontal or vertical pixels.
 4:3 : The input source will be scaled to fit the projection screen.
 16:9 : The input source will be scaled to fit the width of the
screen.
 480p : Provide the best display for a 480p 16:9 signal.
Source Lock
When source lock is turned off, the projector will search for other
signals if the current input signal is lost. When source lock is turned
on, it will “Lock” the current source channel before you press
“Source” button on remote control for next channel.
Projection

Front-Desktop
The factory default setting.

Rear-Desktop
When you select this function, the projector reverses the
image so you can project behind a translucent screen.

Front-Ceiling
When you select this function, the projector turns the im-
age upside down for ceiling-mounted projection.
Image
(Computer / Video
Mode)