---
title: "Flutter PDF annotation events and notifications | Nutrient SDK"
canonical_url: "https://www.nutrient.io/guides/flutter/events-and-notifications/annotation/"
md_url: "https://www.nutrient.io/guides/flutter/events-and-notifications/annotation.md"
last_updated: "2026-06-09T10:25:14.448Z"
description: "Nutrient Flutter SDK lets you listen to various events that occur when the end user interacts with annotations in a document."
---

# Annotation events and notifications

Nutrient Flutter SDK lets you listen to various events that occur when the end user interacts with annotations in a document. The following events are supported:

| Listener                | Description                                      |
| ----------------------- | ------------------------------------------------ |
| `annotationsCreated`    | Event triggered when annotations are created.    |
| `annotationsDeselected` | Event triggered when annotations are deselected. |
| `annotationsUpdated`    | Event triggered when annotations are updated.    |
| `annotationsDeleted`    | Event triggered when annotations are deleted.    |
| `annotationsSelected`   | Event triggered when annotations are focused.    |

Most use cases should be covered by these listeners, and they can be used as such:

```dart

nutrientViewController.addEventListener(NutrientEvent.annotationsCreated, (event) {
  print('Annotations created: $event');
});

```

For more advanced use cases, consider exploring the Nutrient native and web SDKs for customization. Refer to the [Nutrient Flutter SDK customization](https://www.nutrient.io/guides/flutter/customize.md) guide and the following documentation links for more information:

- [iOS](https://www.nutrient.io/guides/ios/events-and-notifications.md)

- [Android](https://www.nutrient.io/guides/android/events-and-notifications.md)

- [Web](https://www.nutrient.io/guides/web/events.md)
---

## Related pages

- [Analytics events and notifications](/guides/flutter/events-and-notifications/analytics.md)
- [PDF form events and notifications](/guides/flutter/events-and-notifications/forms.md)
- [PDF events and notifications](/guides/flutter/events-and-notifications.md)
- [Text selection events and notifications](/guides/flutter/events-and-notifications/text-selection.md)
- [Viewer events and notifications](/guides/flutter/events-and-notifications/viewer.md)