> 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/guides/viewer-components/annotation-list-i.md).

# View annotations as list in Xamarin

Learn how to use the PTAnnotationViewController class in Xamarin.iOS to display annotations in a PDF document. Follow this tutorial for step-by-step guidance. The Apryse Xamarin SDK streamlines secure

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

The [`PTAnnotationViewController`](https://sdk.apryse.com/api/xamarinios/tools/api/pdftron.PDF.Controls.PTAnnotationViewController.html) class shows a list of all annotations in a document being viewed by a [`PTPDFViewCtrl`](https://sdk.apryse.com/api/xamarinios/tools/api/pdftron.PDF.PDFViewCtrl.html). The list contains any comments that have been added to the annotations.

![](https://653871032-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgjsBtuYmcKhWOdM9VCg4%2Fuploads%2Fgit-blob-3b4fe3f15304cc68df980f8cdd4bc58c4130a6d3%2F08935ed43ed617260c9ad07c1e040c5114e3ba47-1242x2208.png?alt=media)

*The annotations list control is part of the Tools library, so make sure you have* [*added the Tools library to your project*](/xamarin/ui-customization/setup.md)*.*

## Show an annotation view controller

To create a new annotation view controller instance and display it from another view controller, supply a `PTPDFViewCtrl` instance to the `PTAnnotationViewController` designated initializer:

{% tabs %}
{% tab title="C#" %}
{% code lineNumbers="true" %}

```csharp
var annotationViewController = new pdftron.PDF.Controls.PTAnnotationViewController (mPdfViewCtrl);
annotationViewController.AnnotationViewControllerAnnotationSelected += (object sender, AnnotationViewControllerAnnotationSelectedEventArgs e) => {
    // perform custom action
    this.DismissViewController (true, null);
};
annotationViewController.AnnotationViewControllerDidCancel += (object sender, EventArgs e) => {
    this.DismissViewController (true, null);
};

var navigationController = new UINavigationController (annotationViewController);
if (UserInterfaceIdiomIsPad)
{
    navigationController.ModalPresentationStyle = UIModalPresentationStyle.Popover;
    navigationController.PopoverPresentationController.BarButtonItem = annotationListButton;
}

this.PresentViewController (navigationController, true, null);
```

{% endcode %}
{% endtab %}
{% endtabs %}

{% hint style="info" %}
**The annotation view controller must be pushed onto a navigation controller's stack before being shown.**
{% endhint %}

{% hint style="info" %}
**Presenting on iPads:**

The annotation view controller is designed to be presented in a popover on iPads. To do so, you must provide the `PTAnnotationViewController`'s [`PopoverPresentationController`](https://docs.microsoft.com/en-us/dotnet/api/uikit.uipopoverpresentationcontroller) with either:

* a [`SourceRect`](https://docs.microsoft.com/en-us/dotnet/api/uikit.uipopoverpresentationcontroller.sourcerect#UIKit_UIPopoverPresentationController_SourceRect) AND
* a [`SourceView`](https://docs.microsoft.com/en-us/dotnet/api/uikit.uipopoverpresentationcontroller.sourceview#UIKit_UIPopoverPresentationController_SourceView)

OR

* a [`BarButtonItem`](https://docs.microsoft.com/en-us/dotnet/api/uikit.uipopoverpresentationcontroller.barbuttonitem#UIKit_UIPopoverPresentationController_BarButtonItem)

as in the example above.
{% endhint %}

You can set a delegate to be notified by the annotation view controller when annotations are selected with the `PTAnnotationViewControllerDelegate` protocol. (See the CompleteReader sample for usage of the `PTAnnotationViewController`.)


---

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