<!--
{
  "availability" : [
    "iOS: 11.0.0 -",
    "iPadOS: 11.0.0 -",
    "macCatalyst: 13.1.0 -",
    "macOS: 10.5.0 -",
    "tvOS: 11.0.0 -",
    "visionOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "PDFKit",
  "identifier" : "/documentation/PDFKit/PDFView/annotationsChanged(on:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "PDFKit"
    ],
    "preciseIdentifier" : "c:objc(cs)PDFView(im)annotationsChangedOnPage:"
  },
  "title" : "annotationsChanged(on:)"
}
-->

# annotationsChanged(on:)

Tells the PDF view that an annotation on the specified page has changed.

```
func annotationsChanged(on page: PDFPage)
```

## Discussion

When the `PDFView` object receives this message, it rescans for tool tips and pop-ups and informs the `PDFThumbailView` objects so the thumbnail images can be redrawn.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)