> 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/editing-page-content.md). # Editing page content - [Edit PDF pages with iOS library](https://docs.apryse.com/ios/editing-page-content/edit.md): Learn how to stamp, remove, read, write, replace, and manage graphics in PDF documents with this comprehensive guide. Master undo and redo operations easily. The Apryse iOS SDK streamlines secure docu - [Undo and redo tool for iOS](https://docs.apryse.com/ios/editing-page-content/edit/undoredo.md): Discover how the PDFNet SDK's undo and redo API allows for efficient management of document edits beyond annotations. Learn how to navigate through document states seamlessly with this comprehensive g - [Adding a stamp to PDFs on iOS](https://docs.apryse.com/ios/editing-page-content/stamp.md): Stamp PDF pages with text, images, or other PDF pages using Apryse SDK. Learn how to embed fonts, copy graphical elements, and add watermarks easily. Explore Stamper for efficient PDF content stamping - [Removing images from PDF page on iOS](https://docs.apryse.com/ios/editing-page-content/remove.md): Learn how to remove all images from a document page using PDF Editor (Programmatic) with this full code sample. Strip images and change text color to blue. The Apryse iOS SDK streamlines secure docume - [Reading page content on iOS](https://docs.apryse.com/ios/editing-page-content/read.md): Learn how to read page content from a PDF document with full code samples. Traverse page display lists using ElementReader for SEO optimization. Understand Form XObjects, Type3 font glyphs, and tiling - [Write page content to PDF on iOS](https://docs.apryse.com/ios/editing-page-content/write.md): Learn how to write page content to a new document, embed elements in PDF pages, and edit page content programmatically with PDFNet. Full code samples included. The Apryse iOS SDK streamlines secure do - [Replacing text & images in PDFs on iOS](https://docs.apryse.com/ios/editing-page-content/replace.md): Learn how to replace text or images in a PDF with this full code sample using pdftron.PDF.ContentReplacer. Enhance your PDF editing skills today! The Apryse iOS SDK streamlines secure document process - [Graphics state on iOS](https://docs.apryse.com/ios/editing-page-content/graphics-state.md): Learn how to extract data from PDF files, including images, text, and paths. Explore a full code sample for PDF data extraction and processing changes in the graphics state efficiently with Apryse SDK - [Code samples to edit PDFs on iOS](https://docs.apryse.com/ios/editing-page-content/samples.md): Learn how to edit, insert images, search & replace text, stamp, extract images, and more with PDF Editor (Programmatic) sample code. Master PDF manipulation techniques now! The Apryse iOS SDK streamli - [APIs to edit PDFs on iOS](https://docs.apryse.com/ios/editing-page-content/apis.md): Discover utility classes for editing PDF documents in iOS using Objective-C and Swift. Explore PTPDFDoc, PTElementBuilder, PTElementReader, PTElementWriter, and PTContentReplacer. The Apryse iOS SDK s --- # 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/editing-page-content.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.