Manage annotations

The PDF Toolbox SDK lets you manage annotations in PDF documents. PDF annotations are elements that allow you to add comments, suggestions, and markup like shapes and highlights to PDFs. Annotations are not part of the page content as they are applied on the top of a page. In contrast to ordinary page content, many annotation types behave interactively in PDF viewers.

The PDF Toolbox SDK supports the following types of annotations:

Type	Annotation name
Text Markup	Highlight Popup StickyNote StrikeThrough Underline
Shape	Ellipse Ink Line Polygon PolyLine Rectangle Squiggly
Navigation	InternalLink WebLink
Stamp	TextStamp CustomStamp
File	FileAttachment

Manage annotations

Learn how to add annotations to a PDF using the Add annotations (C, C#, Java, and Python) code example.

Quick start

Get the full sample on GitHub: C# and Java.