> 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/xamarin/collaboration/collab.md). # Documentation Collaboration in Xamarin Learn how to set up the viewer for real-time collaboration, connect to your own server, and customize the UI with detailed instructions. Perfect for adding support to your back-end server. The Apryse Apryse includes full support for realtime collaboration, which lets many users view the same PDF, Office or image file at the same time across their devices and communicate via comments, highlights, signatures and other annotations, making it easy synchronize annotations and messages from multiple users on a central copy of a document. The Apryse API was designed to support any back-end (central server), enabling realtime collaboration with pre-existing infrastructure or whatever is best for your project There are several aspects of realtime collaboration covered in this section: * Handling incoming annotation data from the server * Sending client annotation data to the server * Customizing the annotation reply UI See the next sections provide detailed instructions on how to run the samples, and for how to add support for your own back-end server. ## Get started [Setup viewer (Android)](/xamarin/collaboration/setup.md) To setup the viewer for realtime collaboration. [Connect to server](/xamarin/collaboration/server.md) To connect with your own Firebase server or WebViewer server. [Custom UI](/xamarin/collaboration/client.md) To customize to UI and modifying themes, layout, and attributes. --- # 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 dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.apryse.com/xamarin/collaboration/collab.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.