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PDFTron is now Apryse, learn more here.

Xamarin / Changelog / v9.1.1



PDFTron is now Apryse, learn more here.

Version 9.1.1 Changelog (November 8, 2021)

Version: 9.1.1

Release Date: November 8, 2021


This release of Apryse for Xamarin brings the core PDF functionality and iOS and Android Tools functionality inline with version 9.1.1 of the iOS and Android SDKs. More information can be found on What's New for iOS and What's New for Android .


  • Adds support for nested OCG layers
Normal stateDisabled state
  • Cropping dialog UX updates
  • Viewer scrollbar UX updates
  • Adds ability to allow users enter password to remote PDF documents
  • Adds ability to scroll with 1 finger when in sticky note, free text, sound and file attachment tool creation mode
  • Adds ability to collapse all nodes in outline UI
  • Outline UI now respects bold/italic flags on each node
  • New API to specify edit modes and undo modes for collaboration viewer
  • New API to reload user bookmarks list after importing bookmarks JSON


New features

  • Ability to annotate in reflow
  • Form creation toolbar
  • Redaction toolbar
  • New Signature UI
  • Digital signature validation
  • Rich text support (ability to underline, bold and italicize words within a free text annotation)
  • Nested OCG Layer support
  • Improved performance when opening documents with a very large number of annotations
  • Adds ability to scroll with 1 finger when in sticky note, free text, sound and file attachment tool creation mode
  • Ability to export an file-size optimized copy of a PDF
  • New delegate methods/notifications for when an annotation is flattened
  • Annotation editing modes: the default .EditAll mode allows any user/author to edit or delete any annotation, while using the .EditOwn mode the current user/author is limited to editing or deleting only their own annotations
  • Device locale is used to determine if a "." or a "," should be used as the decimal separator in measurement annotations

Bug fixes

  • Removes the scan text UIMenuItem from the standard long-press menu on iOS 15
  • UINavigationBar styling is functions as expected in all use cases on iOS 15
  • Rapidly pressing the undo/redo buttons will no longer crash
  • Export flattened copy is functional again.
  • Fixes an issue where a selected annotation would sometimes appear to disappear when the device was rotated.
  • Fixes an issue where the viewer could become unresponsive for a few seconds.
  • Fixes a memory leak in the viewer.
  • Dismissing an editable combo box by tapping on the edit row saves back text
  • Loupe will no longer occasionally get stuck on screen when using the line/ruler create tools.
  • Measurement calibrations apply to all calibrations
  • Fixes an issue where on occasion there would be a crash when returning from the background
  • New annotation default style/properties are now respected when updating from a previously installed copy of the app.
  • Fixes an issue with the annotation list control not updating correctly when opening subsequent documents
  • Fixes an issue where annotations would remain in the annotation list control after being deleted from the document
  • Fixes an issue when erasing ink annotations with empty stroke data.
  • Fixes an issue where measurement calibrations could not be applied in certain locales.

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