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Setting Up Your Apple LED Cinema Display as an Additional Display
When you leave the lid on your MacBook open, you can mirror the same desktop
image on both displays or use the additional display as an extension of your desktop.
Use Displays preferences to set up video mirroring or extended desktop.
To set up video mirroring or extended desktop:
1 Choose Apple () > System Preferences, and then click Displays.
2 Click the Arrangement tab and follow the onscreen instructions.
Adjusting the Resolution, Brightness, and Color
Your Apple LED Cinema Display can automatically adjust the screen brightness for
current light conditions using the built-in ambient light sensor. You can turn auto-
brightness on or o in Displays preferences.
To change the resolution or brightness:
1 Choose Apple () > System Preferences, and then click Displays.
2 Choose a resolution or drag the Brightness slider.
You can also use the brightness keys on an external Apple Keyboard to increase ( ) or
decrease ( ) the brightness of your display.
To change the display color prole or calibrate your display:
1 Click the Color tab in Displays preferences.
2 Choose a display color prole, or click Calibrate to open the Display Calibrator Assistant.
For more information about calibrating your display, choose Help > Mac Help in the
menu bar and search for “calibrate.”
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