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# usesRuler

A Boolean value that controls whether the text views sharing the receiver’s layout manager use a ruler.

```
var usesRuler: Bool { get set }
```

## Discussion

<doc://com.apple.documentation/documentation/Swift/true> to cause text views sharing the receiver’s layout manager to respond to [`NSRulerView`](/documentation/AppKit/NSRulerView) client messages and to paragraph-related menu actions, and update the ruler (when visible) as the selection changes with its paragraph and tab attributes, otherwise <doc://com.apple.documentation/documentation/Swift/false>.

## See Also

[`rangeForUserParagraphAttributeChange`](/documentation/AppKit/NSTextView/rangeForUserParagraphAttributeChange)

The range of characters affected by an action method that changes paragraph (not character) attributes.


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