> 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/changelogs/version-9/v9-0-0.md).

# Version 9.0.0 Changelog (May 3, 2021)

World's #1 PDF SDK Library for Web, Mobile, Server, Desktop

Version: 9.0.0

Release Date: May 3, 2021

## Notes

This release of Apryse for Xamarin brings the core PDF functionality and iOS and Android Tools functionality inline with version 9.0.0 of the iOS and Android SDKs. More information can be found on [What's New for iOS](/ios/changelogs/version-9/v9-0-0-77669.md) and [What's New for Android](/android/changelogs/version-9/v9-0-0.md).

## Xamarin.Android

### New features

* Lasso tool now supports splitting ink annotation by strokes

![](https://653871032-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgjsBtuYmcKhWOdM9VCg4%2Fuploads%2Fgit-blob-298cb112ed27cf38a0571e1d89388ef9d3452b2c%2F23c5381ed305ad69cc8bd266617311ebb6553efb-410x862.gif?alt=media)

* New optional [compact toolbar UI](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.PDF.Config.ViewerConfig.Builder.html#pdftron_PDF_Config_ViewerConfig_Builder_UseCompactViewer_System_Boolean_) with single line instead of two lines

![](https://653871032-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgjsBtuYmcKhWOdM9VCg4%2Fuploads%2Fgit-blob-549929a9bd2e1237f96bcb369871eb959772d2e3%2Fea3b26715791b516c983efc9e4b73d81f4bc6b67-540x1110.png?alt=media)

* New admin mode for [collaboration viewer](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.Collab.UI.Viewer.CollabViewerBuilder2.html#pdftron_Collab_UI_Viewer_CollabViewerBuilder2_UsingAnnotationManagerMode_pdftronprivate_PDF_PDFViewCtrl_AnnotationManagerMode_)
* Theme revamp: most of the viewer components now come with a theme that can be modified in your application, check out theme guide here: [Customize the viewer's theme](/xamarin/guides/viewer-components/custom-theme-a.md)
* Adds ability to change annotation style properties when using group selection tools (rectangle selection and lasso selection)

## Xamarin.iOS

### New features

* Added a new cloudy border option when creating rectangle annotations in the viewer.
* Added a new [`PTPencilDrawingCreateDelegate`](https://sdk.apryse.com/api/xamarinios/tools/api/pdftron.PDF.Tools.PTPencilDrawingCreateDelegate.html) protocol which provides a [`StrokeAdded:`](https://sdk.apryse.com/api/xamarinios/tools/api/pdftron.PDF.Tools.PTPencilDrawingCreateDelegate.html#pdftron_PDF_Tools_PTPencilDrawingCreateDelegate_StrokeAdded_pdftron_PDF_Tools_PTPencilDrawingCreate_) callback when a new stroke is added using the [`PTPencilDrawingCreate`](https://sdk.apryse.com/api/xamarinios/tools/api/pdftron.PDF.Tools.PTPencilDrawingCreate.html) tool.
* New admin mode for [collaboration](https://sdk.apryse.com/api/xamarinios/tools/api/pdftron.PDF.Utils.PTCollaborationManager.html#pdftron_PDF_Utils_PTCollaborationManager__ctor_pdftron_PDF_Tools_PTToolManager_System_String_pdftron_PDF_PTExternalAnnotManagerMode_)
* The annotations in the [`PTAnnotationViewController`](https://sdk.apryse.com/api/xamarinios/tools/api/pdftron.PDF.Controls.PTAnnotationViewController.html) can now be hidden via the new [`AnnotationsHidden`](https://sdk.apryse.com/api/xamarinios/tools/api/pdftron.PDF.Controls.PTAnnotationViewController.html#pdftron_PDF_Controls_PTAnnotationViewController_AnnotationsHidden) property.
* Improved the visibility of the `Complete Annotation` button when creating `Polyline`, `Polygon`, and `Cloud` annotations.

### Bug fixes

* Fixed an issue where the keyboard would dismiss and reappear when switching between form fields.
* Fixes an issue where measurement annotations would show the wrong measurements when viewed on other platforms.
* Fixes an issue where Callout annotations could be resized even in readonly mode.
* Fixes an issue where the viewer would flash when downloading documents with slightly varying page sizes.


---

# 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/changelogs/version-9/v9-0-0.md?ask=<question>&goal=<endgoal>
```

`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.