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# transitionOptions

The animation options to use when switching between tabs.

```
var transitionOptions: NSViewController.TransitionOptions { get set }
```

## Discussion

By default, this property is set to the [`crossfade`](/documentation/AppKit/NSViewController/TransitionOptions/crossfade) and [`allowUserInteraction`](/documentation/AppKit/NSViewController/TransitionOptions/allowUserInteraction) options.

The tab view controller uses the [`transition(from:to:options:completionHandler:)`](/documentation/AppKit/NSViewController/transition(from:to:options:completionHandler:)) method to perform transitions between tabs. For more information about how transitions happen, see the description of that method.

---

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