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# highlight(_:)

Highlights (or unhighlights) the button.

```
func highlight(_ flag: Bool)
```

## Parameters

`flag`

<doc://com.apple.documentation/documentation/Swift/true> to highlight the button; <doc://com.apple.documentation/documentation/Swift/false> to unhighlight the button.  If the current state of the button matches `flag`, no action is taken.

## Discussion

Highlighting makes the button appear recessed, displays its alternate title or image, or causes the button to appear illuminated.

## See Also

[`-  setButtonType:`](/documentation/AppKit/NSButton/setButtonType(_:))

Sets the button’s type, which affects its user interface and behavior when clicked.


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