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10.7: Adjusting display brightness with multiple displays
Authored by: Ruprik on Feb 09, '13 04:40:13PM

On an Apple Cinema LED display, be sure that the USB port is plugged into your Mac and use shift F1 (display dim) and shift F2 (display bright) for the external monitor, just F1 and F2 for the primary monitor (or laptop display). On the Thunderbolt display, this works the same but no USB cable is present (or required).

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