Apple AppleVision 1710AV - Manual (Page 66)

5 Drag the picker in the color triangle until the color sample in the lower-right corner of the
window is similar to the gray color on the tool.
This gives you a general color adjustment.
6 Drag the control on the Brightness slider until the color sample matches the tool exactly.
When the tool and sample match, the hole in the tool seems to disappear.
7 Click Save.
A dialog box appears.
8 Enter a name for your ambient light setting and click Save.
The ambient light setting is saved, and the name appears in the Custom
Ambient Light pop-up menu.
9 Click Recalibrate.
After several seconds, your display is recalibrated to correct for ambient light.
10 Close the AppleVision Setup control panel.
Using an existing ambient light setting
You may want to create and use more than one ambient light setting for your
display. For example, if your display is near a window, you may want one
ambient light setting for the morning and another for the afternoon.
Note: Color adjustments may not work correctly if your display is in direct
sunlight.
1 Open the AppleVision Setup control panel and click the Color button.
The Color window appears.
53 Fine-Tuning Display Color