Apple Multiple Scan 20 Display - Manual (Page 29)

In most cases, you won’t need to make any adjustments in the picture.
However, you can fine-tune the screen display to suit your preferences using
the controls on the front of the monitor.
Reset button
Press this button to select
a picture control to the left.
Indicator lights
for picture controls
Contrast
controls
Brightness
controls
Control button
23
3
Adjusting the Picture