Overview ​

Annotations allow users to highlight paragraphs, add comments, markup, sign, or stamp PDF documents without modifying the original author's content. The annotated content, along with the original text, can then be shared together.

Benefits of ComPDFKit PDF Annotation SDK ​

• Comprehensive Type Support: Enables highlighting, text, freehand drawing, shapes, stamps, and more.
• Create, Edit, Delete: Perform creation, editing, and deletion operations either programmatically or directly through the UI.
• Flattened Annotations: Embed annotations permanently onto the document as images, ensuring document appearance stability and preventing further modifications.
• Annotation Events: Trigger specified workflows to achieve automation.
• Annotation Import and Export: Export annotations as XFDF templates and apply them to multiple documents.
• Fast UI Integration: Achieve rapid integration and customization through extensible UI components.

Guides for Annotations ​

• Access Annotations

  Get a list of annotations and individual annotation objects within a document.

• Create Annotations

  Generate annotations of various types.

• Edit Annotations

  Modify annotation positions, appearances, and properties.

• Update Annotation Appearances

  After edit the annotation properties, update the annotation appearance to apply the changes.

• Delete Annotations

  Remove an annotation from the document.

• Import and Export

  Export annotations as XFDF templates and apply them to multiple documents.

• Flatten Annotations

  Permanently embed existing annotations within the document as images.

• Predefine Annotations

  Set default values for certain annotation properties, such as the color and line width of Ink annotations.

• Annotation Replies

  Add replies and comments to facilitate written discussions directly within the document.