> 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/ios/annotation/annotation.md). # PDF Annotation Library for iOS Configure annotation tools with PTToolManager for creating, editing, and customizing annotations. Learn about annotation lists, toolbar, style editor, and more. Optimize your document workflow now! Th 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 [Config annotation tools](/ios/annotation/customization.md) To configure annotation tools using PTToolManager. [Annotation list](/ios/annotation/annotation-list-i.md) To display a list of all annotations in a document. [Annotation toolbar](/ios/annotation/annotation-toolbar-i.md) To display a toolbar to create annotations and easily switch between different annotation tools. [Style editor](/ios/annotation/annot-style.md) To display a style editor where users can change annotation colors. [Style properties](/ios/annotation/style.md) To set an annotation style property such as color, interior color, border style, padding, etc to an annotation. [Default Style properties](/ios/annotation/annotation-default-properties.md) To configure default annotation style properties such as border color, border thickness, fill color, and more. [Custom appearances](/ios/annotation/custom-annot-appearance.md) To customize an annotations appearance such as with a custom image. [Events/triggers](/ios/annotation/tool-manager-events.md) An introduction to events and triggers available from the ToolManager. [Disable create/edit](/ios/annotation/disabling-tools.md) To selectively disable creation or editing of annotations. [Remove annotation](/ios/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/ios/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.