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# updateRuler()

Updates the ruler view in the receiver’s enclosing scroll view to reflect the selection’s paragraph and marker attributes.

```
func updateRuler()
```

## Discussion

Does nothing if the ruler isn’t visible or if the receiver doesn’t use the ruler. You should never need to invoke this method directly, but you can override this method if needed to handle additional ruler attributes.

## See Also

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

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


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