> 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/basic-operations/basics/tools/toolmanager-events.md).

# ToolManager events

Learn how to utilize ToolManager events in Xamarin.Android for efficient app coordination. Register callbacks, get notified on touch and annotation events, and more. Explore all event APIs here! The A

{% hint style="info" %}
**This tutorial only applies to Xamarin.Android. See Xamarin.iOS equivalent here .**
{% endhint %}

The [`ToolManager`](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.PDF.Tools.ToolManager.html) exposes a number of events to allow a subscriber to be notified of events fired from the tools package. There are [a number of methods](/xamarin/annotation/annotation-handling.md#android) that allow you to modify the behaviour of the tools themselves. The methods discussed here are simple notifications, so that the app may coordinate as necessary.

See all event APIs here: [ToolManager events](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.PDF.Tools.ToolManager.html#events).

| Scenario                                       | Method to use to register your callback                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| ---------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Get notified on touch events                   | Example: [`LongPress`](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.PDF.Tools.ToolManager.html#pdftron_PDF_Tools_ToolManager_LongPress), [`SingleTapConfirmed`](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.PDF.Tools.ToolManager.html#pdftron_PDF_Tools_ToolManager_SingleTapConfirmed) etc.                                                                                                                                                                                  |
| Get notified on annotation events              | Example: [`InterceptAnnotationHandling`](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.PDF.Tools.ToolManager.html#pdftron_PDF_Tools_ToolManager_InterceptAnnotationHandling)                                                                                                                                                                                                                                                                                                                    |
| Get notified on annotation modification events | Example: [`AnnotationsAdded`](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.PDF.Tools.ToolManager.html#pdftron_PDF_Tools_ToolManager_AnnotationsAdded), [`AnnotationsModified`](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.PDF.Tools.ToolManager.html#pdftron_PDF_Tools_ToolManager_AnnotationsModified), [`AnnotationsRemoved`](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.PDF.Tools.ToolManager.html#pdftron_PDF_Tools_ToolManager_AnnotationsRemoved) etc. |
| Get notified on quick menu events              | Example: [`QuickMenuClicked`](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.PDF.Tools.ToolManager.html#pdftron_PDF_Tools_ToolManager_QuickMenuClicked)                                                                                                                                                                                                                                                                                                                                          |
| Get notified on tool changed event             | [`ToolChanged`](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.PDF.Tools.ToolManager.html#pdftron_PDF_Tools_ToolManager_ToolChanged)                                                                                                                                                                                                                                                                                                                                                             |


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