---
title: fullScreenAccessoryView
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nstoolbar/fullscreenaccessoryview
---

# fullScreenAccessoryView

The toolbar’s full screen accessory view.

## Declaration

```swift
var fullScreenAccessoryView: NSView? { get set }
```

## Discussion

Discussion When entering full screen mode, the accessory view is removed from the window if necessary, and attaches underneath the toolbar. When leaving full screen mode, the accessory view is returned to the window, if it was in the window previously. To customize this behavior, you can implement the NSWindow delegate method windowWillExitFullScreen(_:).

## See Also

### Deprecated

- [centeredItemIdentifier](appkit/nstoolbar/centereditemidentifier.md)
- [fullScreenAccessoryViewMinHeight](appkit/nstoolbar/fullscreenaccessoryviewminheight.md)
- [fullScreenAccessoryViewMaxHeight](appkit/nstoolbar/fullscreenaccessoryviewmaxheight.md)
- [sizeMode](appkit/nstoolbar/sizemode-swift.property.md)
- [NSToolbar.SizeMode](appkit/nstoolbar/sizemode-swift.enum.md)