> 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/viewer.md). # Viewer - [iOS PDF Viewer Library](https://docs.apryse.com/ios/viewer/viewer.md): Configure your document viewer with ease using Config Viewer. Customize PTPDFViewCtrl, change view modes, themes, and more for an enhanced viewing experience. Learn about localization, keyboard shortc - [File coordination](https://docs.apryse.com/ios/viewer/viewer/file-coordination.md): Learn about file coordination in iOS using UIDocument and PTCoordinatedDocument by Apryse. Ensure data integrity and avoid conflicts when accessing shared files. Optimize your app's performance with c - [Customize the Document Viewer UI](https://docs.apryse.com/ios/viewer/viewer/new-ui-customization-ios.md): Learn how to customize and manipulate toolbar items in your app using a PTDocumentController. Hide, show, remove, and add buttons and toolbars with code examples provided. Optimize your app's user int - [Integrate the new Viewer UI](https://docs.apryse.com/ios/viewer/viewer/new-ui-integration-ios.md): Discover how to seamlessly migrate your existing implementation with our migration guide. Learn about using PTDocumentController for single document viewing and PTTabbedDocumentViewController for tabb - [Migrating from a PTDocumentViewController to a PTDocumentController](https://docs.apryse.com/ios/viewer/new-ui-migration-ios.md): Learn about the new UI overview in version 8.0.0, including the introduction of PTDocumentController as a replacement for PTDocumentViewController. Update your code seamlessly with these API changes. - [New Document Viewer UI](https://docs.apryse.com/ios/viewer/new-document-viewer-ui-ios.md): Discover the enhanced UI features of Apryse's iOS SDK Version 7.1.5, including customizable annotation tools, multiple toolbars, view mode, presets, and more. Upgrade your document viewer experience n - [PDF viewer (PTPDFViewCtrl) settings for iOS](https://docs.apryse.com/ios/viewer/customize-pdfviewctrl-i.md): Discover the extensive capabilities of PDFViewCtrl, a powerful tool for controlling how PDFs are presented to users. Learn about its APIs and functionalities in this comprehensive guide. The Apryse iO - [View mode](https://docs.apryse.com/ios/viewer/view-mode.md): Discover how to optimize your iOS PDFViewCtrl with different page layout and fit modes. Learn how to adjust presentation modes for the best viewing experience. Click to find out more! The Apryse iOS S - [Scroll direction in iOS viewer](https://docs.apryse.com/ios/viewer/scrolling-direction.md): Learn how to change scrolling direction in PDFViewCtrl by setting page layout mode. Enable vertical or horizontal scrolling for a seamless viewing experience. The Apryse iOS SDK streamlines secure doc - [Page color mode](https://docs.apryse.com/ios/viewer/night-mode.md): Enhance your PDF viewing experience with PDFViewCtrl's special color modes: night mode, inverted color mode, and custom color mode. Learn how to set and customize color modes for optimal reading. The - [Open & stream PDF from URL on iOS](https://docs.apryse.com/ios/viewer/view-online-pdfs.md): Efficiently open & stream PDFs from URL in iOS with Apryse Technology that allows partial content online PDF viewing. - [Convert between different coordinates on iOS](https://docs.apryse.com/ios/viewer/coordinates.md): Convert PDF coordinates easily with PDFViewCtrl. Learn about PDF page, screen, and scrolling coordinates. Understand how to navigate different coordinate systems in PDF documents. The Apryse iOS SDK s - [Localization](https://docs.apryse.com/ios/viewer/localization.md): Learn how to localize the Tools.framework for any language with this comprehensive guide. Follow step-by-step instructions to add localization to your app and customize user-facing strings. The Apryse - [Keyboard shortcuts](https://docs.apryse.com/ios/viewer/keyboard-shortcuts.md): Discover essential keyboard shortcuts for navigating PDFs efficiently. Learn how to use action shortcuts like Previous Page, Next Page, Zoom In, and more. Optimize your workflow with these handy comma - [PDF viewer samples for iOS](https://docs.apryse.com/ios/viewer/samples.md): Discover the features of the SDK with our sample app showcase. Explore viewer demos including Zoom and Multi-Tabbed viewer modes. Click to experience it now! The Apryse iOS SDK streamlines secure docu - [APIs for iOS PDF Viewer](https://docs.apryse.com/ios/viewer/apis.md): Discover utility classes like PTPDFViewCtrl and PTDocumentController for interactive PDF viewing and editing. Explore PTTabbedDocumentViewController for a seamless tabbed interface experience. The Apr --- # 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. 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