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Possible Duplicate:
Is it possible to put the display to sleep without putting the whole computer to sleep?

I have an iMac, and sometimes I want to play some music over night, without the bright display. The display will be turned off automatically several minutes later, but I would like a button that turns the display off instantly and keeps the music playing.

How can I do this?

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marked as duplicate by Daniel, Kyle Cronin Nov 8 '11 at 20:35

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

up vote 20 down vote accepted

Ctrl+Shift+Eject will turn off the displays but leave the computer active.

Control ⌃+Shift ⇧+Power ⌽ for some Macbook

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Use ctrl + shift + Eject to turn off display.

You can also set a "hot-corner" to turn off display in a few seconds.

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