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# backingType

The window’s backing store type.

```
var backingType: NSWindow.BackingStoreType { get set }
```

## Discussion

The possible values for this property are described in [`NSWindow.BackingStoreType`](/documentation/AppKit/NSWindow/BackingStoreType). You can set the property only to switch a buffered window to retained or vice versa; you can’t change the backing type to or from nonretained after initializing a `NSWindow` object (an error is generated if you attempt to do so).

## See Also

[`-  initWithContentRect:styleMask:backing:defer:screen:`](/documentation/AppKit/NSWindow/init(contentRect:styleMask:backing:defer:screen:))

Initializes an allocated window with the specified values.

[`-  initWithContentRect:styleMask:backing:defer:`](/documentation/AppKit/NSWindow/init(contentRect:styleMask:backing:defer:))

Initializes the window with the specified values.


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