Putting 23-inch display to sleep by pressing button on side

When I use to press the bottom button on the side of the display it would put my screen to sleep. Now when I press it, it prompts me to shut the computer down. How can I set it up so that it puts the display to sleep when pressed?
Thanks!

You can't just put the monitor to sleep with the side button, it puts both the computer and display to sleep. You can have the button set to turn the display on or off, leaving the computer unaffected. almost like sleep as only takes 1-2 seconds for screen image to appear once the button is pressed to turn monitor on.
To change preferences go to System Preferences under the  and click on Displays. Then click on Options to set the preferences you want.

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windmarble wrote:
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In modern English it usually refers to "a short period of time",[2] the exact length remaining ambiguous.

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May be try magic
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Putting 23-inch display to sleep by pressing button on side

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