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# NSTabViewController.TabStyle.unspecified

A style that indicates the tab view controller does not provide the tab selection UI. Your app provides the control (such as an [`NSSegmentedControl`](/documentation/AppKit/NSSegmentedControl) or [`NSPopUpButton`](/documentation/AppKit/NSPopUpButton)) for navigating between tabs. You can bind an existing control to the tab view controller object so that interactions with the control automatically change tabs.

```
case unspecified
```

---

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