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  "title" : "PaperMarkupViewController.Delegate"
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# PaperMarkupViewController.Delegate

The interface for responding to interactions in a markup view controller.

```
protocol Delegate : AnyObject
```

## Topics

### Responding to markup changes

[`func paperMarkupViewControllerDidChangeMarkup(PaperMarkupViewController)`](/documentation/PaperKit/PaperMarkupViewController/Delegate-swift.protocol/paperMarkupViewControllerDidChangeMarkup(_:))

Tells the delegate when the markup changes.

[`func paperMarkupViewControllerDidChangeSelection(PaperMarkupViewController)`](/documentation/PaperKit/PaperMarkupViewController/Delegate-swift.protocol/paperMarkupViewControllerDidChangeSelection(_:))

Tells the delegate when the selection changes.

[`func paperMarkupViewControllerDidBeginDrawing(PaperMarkupViewController)`](/documentation/PaperKit/PaperMarkupViewController/Delegate-swift.protocol/paperMarkupViewControllerDidBeginDrawing(_:))

Tells the delegate when a person begins drawing.

[`func paperMarkupViewControllerDidChangeContentVisibleFrame(PaperMarkupViewController)`](/documentation/PaperKit/PaperMarkupViewController/Delegate-swift.protocol/paperMarkupViewControllerDidChangeContentVisibleFrame(_:))

Tells the delegate when a person scrolls or zooms the content.

### Responding to adornment interactions

[`func paperMarkupViewController(PaperMarkupViewController, didTapAdornmentWithID: UUID)`](/documentation/PaperKit/PaperMarkupViewController/Delegate-swift.protocol/paperMarkupViewController(_:didTapAdornmentWithID:))

Tells the delegate when a person taps an adornment.

[`func paperMarkupViewController(PaperMarkupViewController, willUpdateAdornmentWithID: UUID, toProposedAnchor: MarkupAdornment.Anchor) -> MarkupAdornment.Anchor?`](/documentation/PaperKit/PaperMarkupViewController/Delegate-swift.protocol/paperMarkupViewController(_:willUpdateAdornmentWithID:toProposedAnchor:))

Asks the delegate to validate and potentially adjust an adornment’s proposed anchor position.

[`func paperMarkupViewController(PaperMarkupViewController, didUpdateAdornmentWithID: UUID, toAnchor: MarkupAdornment.Anchor)`](/documentation/PaperKit/PaperMarkupViewController/Delegate-swift.protocol/paperMarkupViewController(_:didUpdateAdornmentWithID:toAnchor:))

Tells the delegate when a drag session ends for an adornment.


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