> 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/android/annotation/toolmanager-events.md).

# ToolManager events

Discover how to effectively manage events and customize tool behavior in the tools package with ToolManager. Learn about various methods to receive notifications and coordinate app actions. Optimize y

The [`ToolManager`](https://sdk.apryse.com/api/android/javadoc/reference/com/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](/android/annotation/intercept-annotation-handling.md) 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.

| Scenario                                       | Method to use to register your callback                                                                                                                                                                                                  |
| ---------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Get notified on touch events                   | [`setPreToolManagerListener`](https://sdk.apryse.com/api/android/javadoc/reference/com/pdftron/pdf/tools/ToolManager.html#setPreToolManagerListener\(com.pdftron.pdf.tools.ToolManager.PreToolManagerListener\))                         |
| Get notified on annotation events              | [`setBasicAnnotationListener`](https://sdk.apryse.com/api/android/javadoc/reference/com/pdftron/pdf/tools/ToolManager.html#setBasicAnnotationListener\(com.pdftron.pdf.tools.ToolManager.BasicAnnotationListener\))                      |
| Get notified on annotation modification events | [`addAnnotationModificationListener`](https://sdk.apryse.com/api/android/javadoc/reference/com/pdftron/pdf/tools/ToolManager.html#addAnnotationModificationListener\(com.pdftron.pdf.tools.ToolManager.AnnotationModificationListener\)) |
| Get notified on quick menu events              | [`setQuickMenuListener`](https://sdk.apryse.com/api/android/javadoc/reference/com/pdftron/pdf/tools/ToolManager.html#setQuickMenuListener\(com.pdftron.pdf.tools.ToolManager.QuickMenuListener\))                                        |
| Get notified on tool changed event             | [`addToolChangedListener`](https://sdk.apryse.com/api/android/javadoc/reference/com/pdftron/pdf/tools/ToolManager.html#addToolChangedListener\(com.pdftron.pdf.tools.ToolManager.ToolChangedListener\))                                  |

{% hint style="info" %}
**For any method above that starts with add, you can remove your callback using the corresponding remove method.**
{% endhint %}


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