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# window(_:willUseFullScreenPresentationOptions:)

Returns the presentation options the window uses when transitioning to full-screen mode.

```
@MainActor optional func window(_ window: NSWindow, willUseFullScreenPresentationOptions proposedOptions: NSApplication.PresentationOptions = []) -> NSApplication.PresentationOptions
```

## Parameters

`window`

The window to enter to full-screen mode.

`proposedOptions`

The proposed options. See [`NSApplication.PresentationOptions`](/documentation/AppKit/NSApplication/PresentationOptions-swift.struct) for the possible values.

## Return Value

The options the window should use when transitioning to full-screen mode. These may be the same as the `proposedOptions` or may be modified.

## Discussion

---

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