> 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/samples.md). # Code samples to edit PDFs on iOS 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 [PDF Editor (Programmatic)](/ios/get-started/samples.md#elementedit) The sample code shows how to edit the page display list and how to modify graphics state attributes on existing Elements. [Insert an image into a PDF](/ios/get-started/samples.md#addimage) This sample illustrates how to embed various raster image formats (e.g. TIFF, JPEG, JPEG2000, JBIG2, GIF, PNG, BMP, etc.) in a PDF document. [Search & replace PDF text or images](/ios/get-started/samples.md#contentreplacer) This sample shows how to use pdftron.PDF.ContentReplacer to search and replace text strings and images in existing PDF (e.g. business cards and other PDF templates) [Stamp a PDF File](/ios/get-started/samples.md#stamper) The sample shows how to use 'pdftron.PDF.Stamper' utility class to stamp PDF pages with text, images, or with other PDF pages. [PDF logical structure reader](/ios/get-started/samples.md#logicalstructure) This sample explores the structure and content of a tagged PDF document and dumps the structure information to the console window. [PDF image extraction](/ios/get-started/samples.md#imageextract) This sample illustrates couple of approaches to PDF image extraction. [Read elements across all PDF pages](/ios/get-started/samples.md#elementreader) Illustrates how to traverse page display list using ElementReader. [Undo and/or redo](/ios/get-started/samples.md#undoredotest) This sample demonstrates the basics of undoing and redoing changes to a document. [Build, write, embed elements in PDF pages](/ios/get-started/samples.md#elementbuilder) Illustrates how to use PDFNet page writing API, how to embed fonts and images and how to copy graphical elements from one page to another. --- # 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/samples.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.