Activate the Screen Saver

You can set up OS X to display a screen saver, a moving pattern or series of pictures. The screen saver appears after your computer has been idle for a while. If you leave your monitor on for long stretches while your computer is idle, a faint version of the unmoving image can endure for a while on the screen, a phenomenon known as persistence. A screen saver prevents this by displaying a moving image. However, persistence is not a major problem for modern screens, so for the most part you use a screen saver for visual interest.

Activate the Screen Saver

001 Open System Preferences.

Note: See the “Display System Preferences” ...

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