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# layoutAttribute

The location of the accessory view, in relation to the window’s title bar.

```
var layoutAttribute: NSLayoutConstraint.Attribute { get set }
```

## Discussion

The default value of this property is <doc://com.apple.documentation/documentation/UIKit/NSLayoutConstraint/Attribute/bottom>, which means that the accessory view should display below the title bar. You can also set this property to <doc://com.apple.documentation/documentation/UIKit/NSLayoutConstraint/Attribute/right> or (in apps linked on macOS 10.11 or later) <doc://com.apple.documentation/documentation/UIKit/NSLayoutConstraint/Attribute/left>. All other values are invalid and will cause an assertion to be raised.

> Note:
> In an app linked on macOS 10.11 or later, setting ``doc://com.apple.appkit/documentation/AppKit/NSTitlebarAccessoryViewController/layoutAttribute`` to <doc://com.apple.documentation/documentation/UIKit/NSLayoutConstraint/Attribute/right> does not right indent toolbar items unless the window’s ``doc://com.apple.appkit/documentation/AppKit/NSWindow/titleVisibility-swift.property`` property is equal to ``doc://com.apple.appkit/documentation/AppKit/NSWindow/TitleVisibility-swift.enum/hidden``.

---

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