How do I turn off the main monitor of an all in 1 mac running 10.8.3 when i have a second monitor hooked up to run a stream of photos all night?

How do I turn off the main monitor of an all in 1 mac running 10.8.3 when i have a second monitor hooked up in the window to run a stream of photos all night?

iMac, OS X Mountain Lion (10.8.3)

Posted on Oct 21, 2014 4:20 PM

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