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# shouldMatchFrameRate

A property indicating whether the frame rate of the external display should be configured to match the camera’s frame rate.

```
var shouldMatchFrameRate: Bool { get set }
```

## Discussion

If you want to configure your [`AVCaptureVideoPreviewLayer`](/documentation/AVFoundation/AVCaptureVideoPreviewLayer) to match its source [`activeVideoMinFrameDuration`](/documentation/AVFoundation/AVCaptureDevice/activeVideoMinFrameDuration), set [`shouldMatchFrameRate`](/documentation/AVFoundation/AVCaptureExternalDisplayConfiguration/shouldMatchFrameRate) to `true`. The default value is `false`.

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