> 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.md). # Annotation - [Server/Desktop PDF Annotation Library](https://docs.apryse.com/core/annotation/annotation.md): 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 - [Import annotations on Server/Desktop](https://docs.apryse.com/core/annotation/import.md): Learn how to efficiently merge XFDF or FDF annotations into PDF documents using FDFUpdate, FDFMerge, and MergeXFDF APIs. Choose the best method for your use case and optimize your PDF workflow. The Ap - [Export annotations on Server/Desktop](https://docs.apryse.com/core/annotation/export.md): Learn how to extract data from PDF to FDF and export FDF as XFDF with full sample code for PDF Form Fill and Data Extraction. Complete support for FDF merge/extract functionality. The Apryse Server SD - [Edit annotation style properties on Server/Desktop](https://docs.apryse.com/core/annotation/style.md): Learn how to add or edit PDF annotations with this comprehensive code sample. Set annotation style properties like color, border style, and more. Click to optimize your PDFs now! The Apryse Server SDK - [Add text annotation to a document on Server/Desktop](https://docs.apryse.com/core/annotation/text-annotation.md): Learn how to add a sticky note (text annotation) to a PDF document and edit PDF annotations with this comprehensive code sample. Enhance your PDF files with hyperlinks, stamps, text, shapes, and more! - [Add link annotation to a document on Server/Desktop](https://docs.apryse.com/core/annotation/link-annotation.md): Learn how to add hyperlinks or intra-document link annotations to a PDF document page with this full code sample. Enhance your PDF annotations now! The Apryse Server SDK streamlines secure document pr - [Add a stamp annotation to a PDF on Server/Desktop](https://docs.apryse.com/core/annotation/stamp-annotation.md): Stamp PDF Pages: Learn how to add text, images, or other PDF pages to your documents with Apryse SDK. Explore the benefits of stamping and embedding content easily. Full code sample available for seam - [Add a highlight annotation to a PDF on Server/Desktop](https://docs.apryse.com/core/annotation/highlight-annotation.md): Learn how to add a highlight annotation to a PDF Document page with this code sample. Easily add or edit various PDF annotations like hyperlink, stamp, text, and more. The Apryse Server SDK streamline - [Add a free text annotation to a PDF on Server/Desktop](https://docs.apryse.com/core/annotation/freetext-annotation.md): Learn how to add free text annotations to a PDF document page with this full code sample. Add or edit various PDF annotations like hyperlinks, stamps, and more. The Apryse Server SDK streamlines secur - [Add a rectangle annotation to a PDF on Server/Desktop](https://docs.apryse.com/core/annotation/rectangle-annotation.md): Learn how to add a rectangle annotation to a PDF Document page with this comprehensive code sample. Enhance your PDF annotations now! The Apryse Server SDK streamlines secure document processing with - [Remove annotation from document on Server/Desktop](https://docs.apryse.com/core/annotation/remove.md): Learn how to remove an annotation from a document with our step-by-step guide. Easily manage your files and annotations for a seamless experience. The Apryse Server SDK streamlines secure document pro - [Flatten PDF annotations on Server/Desktop](https://docs.apryse.com/core/annotation/flatten-annotation.md): Flatten annotations in a PDF document with PDF interactive forms (AcroForms). Learn how to merge annotations with page content and flatten forms using Annotation.Flatten() and PDFDoc.FlattenAnnotation - [Code samples to add annotations to PDFs on Server/Desktop](https://docs.apryse.com/core/annotation/samples.md): Learn how to add or edit PDF annotations such as hyperlinks, stamps, text, and more with this comprehensive guide. Enhance your PDF documents effortlessly! The Apryse Server SDK streamlines secure doc - [API for Annotating PDFs on Server/Desktop](https://docs.apryse.com/core/annotation/apis.md): Discover utility classes for annotating PDF documents in various programming languages such as C++, Java, Android, Web, Node.js, .NET, iOS, Xamarin, and UWP with PDFNet.Annot and pdftron.PDF.Annot. 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