# performGammaFade() Indicates whether to perform a gradual screen fade when the system starts and stops your screen saver’s animation. ``` class func performGammaFade() -> Bool ``` ## Discussion This class method allows the screen saver view to select how the desktop visibly transitions to the screen saver view. When this method returns , the screen gradually darkens before the animation begins. When it returns , the screen transitions immediately to the screen saver. The latter behavior is more appropriate if the screen saver animates a screenshot of the desktop, as is the case for optical lens effects. The default is . --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)