> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/core/annotation/annotation.md). # Server/Desktop PDF Annotation Library Learn how to import, export, style, and add various annotations to PDF documents with this comprehensive annotations guide. Master the process of merging data, setting properties, and removing annotat Annotations allow users to mark up and comment on PDFs without altering the original authors content. Apryse SDK Benefits include: * Infinite Undo/Redo * Support for annotation flattening * Support for annotation appearances * XFDF Import * Export annotations to FDF, XFDF, text, or PDF annotation summary * Sticky (Note) * Comments * Text markup (highlight, squiggly, underline, strikeout) * Add shapes (line, arrow, polyline, rectangle, ellipse, polygon, cloud) * Cloud annotations * Apply freehand ink annotations * Signatures * Save the annotations into the PDF file * File attachments * Sound, movie, and 3D annotations * Support for custom annotations * FreeText, Callout * TextHighlight, TextUnderline, TextSquiggly, TextStrikeout * Stamp * Redaction ## Get started [Import annotations](/core/annotation/import.md) To import XFDF into FDF, then merge data from FDF into PDF. [Export annotations](/core/annotation/export.md) To extract data from PDF to FDF, then export FDF as XFDF. [Style properties](/core/annotation/style.md) To set an annotation style property such as color, interior color, border style, padding, etc to an annotation. [Add sticky note](/core/annotation/text-annotation.md) To add sticky note (text annotation) to a PDF Document. [Add link annotation](/core/annotation/link-annotation.md) To add a hyperlink or intra-document link annotation to a PDF Document page. [Add stamp annotation](/core/annotation/stamp-annotation.md) To add a stamp annotation with an image, text, or page to a PDF Document page. [Remove annotation](/core/annotation/remove.md) To remove an annotation from a document. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.apryse.com/core/annotation/annotation.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.