Support for PDF Document Annotations

Apr 02, 2025

The PDF Viewer control can display existing supported annotations in a PDF document.

Supported Annotation Types

CaretThe caret annotation[1] indicates modified text.File Attachment

Associates an attached file with a specific position in a document. A right-click on a file attachment displays a context menu with Open File and Save Embedded File to Disk items.

Free Text AnnotationA static text box.Graphic AnnotationsInclude Line, Square, Circle, Polygon, Polyline, and Ink[1] (freehand drawing imitation) shapes.StampImitates a rubber stamp[1] designed to mark pages.Sticky NoteA comment annotation. Users can hover the mouse pointer over a comment to display its content in a hint.Text MarkupIncludes highlight, underline, strikeout, and squiggly-underline effects.

Annotation Interactivity

The OptionsSelection.Annotations property enables ( default ) or allows you to disable end-user interaction options for PDF annotations (hints, context menus, etc.)

Important Limitations

The PDF Viewer control does not allow you to create new or modify existing PDF annotations. Users can only view and interact with existing annotations.
Support for rubber stamp, caret, and ink annotations is limited.

Footnotes

Has limited support