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# discardCachedImage()

Discards all of the window’s cached image rectangles.

```
func discardCachedImage()
```

## Discussion

An `NSWindow` object automatically discards its cached image rectangles when it displays.

## See Also

[`display()`](/documentation/AppKit/NSWindow/display())

Passes a display message down the window’s view hierarchy, thus redrawing all views within the window.


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