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# CGWindowBackingType

The data type used to specify the backing option for a given window.

```
enum CGWindowBackingType
```

## Overview

This type is used in conjunction with the constants described in [Backing Store Types](/documentation/CoreGraphics/backing-store-types).

## Topics

### Constants

[`CGWindowBackingType.backingStoreBuffered`](/documentation/CoreGraphics/CGWindowBackingType/backingStoreBuffered)

[`CGWindowBackingType.backingStoreNonretained`](/documentation/CoreGraphics/CGWindowBackingType/backingStoreNonretained)

[`CGWindowBackingType.backingStoreRetained`](/documentation/CoreGraphics/CGWindowBackingType/backingStoreRetained)


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