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# didEnterFullScreenNotification

A notification that the window entered full-screen mode.

```
class let didEnterFullScreenNotification: NSNotification.Name
```

## Discussion

The notification object is the `NSWindow` object that entered full-screen mode. This notification doesn’t contain a `userInfo` dictionary.

To observe this notification using Swift concurrency, use [`NSWindow.DidEnterFullScreenMessage`](/documentation/AppKit/NSWindow/DidEnterFullScreenMessage).

---

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