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# rulerView(_:didMove:)

Modifies the paragraph style of the paragraphs containing the selection to record the new location of the marker.

```
func rulerView(_ ruler: NSRulerView, didMove marker: NSRulerMarker)
```

## Parameters

`ruler`

The ruler view sending the message.

`marker`

The marker that was moved.

## Discussion

This method records the change by invoking [`didChangeText()`](/documentation/AppKit/NSTextView/didChangeText()) after moving the marker.

`NSTextView` checks for permission to make the change in its [`rulerView(_:shouldMove:)`](/documentation/AppKit/NSTextView/rulerView(_:shouldMove:)) method, which invokes [`shouldChangeText(in:replacementString:)`](/documentation/AppKit/NSTextView/shouldChangeText(in:replacementString:)) to send out the proper request and notifications, and only invokes this method if permission is granted.

## See Also

[`representedObject`](/documentation/AppKit/NSRulerMarker/representedObject)

The object the receiver represents.


---

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