> 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/thumbnails-view-a.md).

# Using thumbnail browser to manipulate PDFs in Xamarin

Learn how to manipulate pages in a document with ThumbnailsViewFragment in Xamarin.Android. Add, remove, rearrange, and export pages easily. Click to explore more! The Apryse Xamarin SDK streamlines s

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

The [`ThumbnailsViewFragment`](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.PDF.Controls.ThumbnailsViewFragment.html) class allows users to manipuate pages of a document including add, remove, re-arrange, rotate and duplicate pages. Users are also able to undo/redo page manipulations.

![](https://653871032-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgjsBtuYmcKhWOdM9VCg4%2Fuploads%2Fgit-blob-b2be354b1079b2634036eb904006d82e81becb52%2Fb25f5232f4421874bfbbb81868578fbc4b041d7b-1080x2220.gif?alt=media)

## Show page thumbnails dialog

To show a page thumbnails dialog in your activity, create a new instance of [`ThumbnailsViewFragment`](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.PDF.Controls.ThumbnailsViewFragment.html) by calling `newInstance()` and setting the [`PDFViewCtrl`](https://sdk.apryse.com/api/xamarinandroid/pdfnet/api/pdftron.PDF.PDFViewCtrl.html):

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

```csharp
var thumbDialog = ThumbnailsViewFragment.NewInstance();
thumbDialog.SetPdfViewCtrl(mPdfViewCtrl);
thumbDialog.SetStyle((int)DialogFragmentStyle.NoTitle, Resource.Style.PDFTronAppTheme);
thumbDialog.Show(this.SupportFragmentManager, "thumbnails_dialog");
```

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

If you want to specify that the document is read-only you can use `newInstance(boolean)`:

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

```csharp
var thumbDialog = ThumbnailsViewFragment.NewInstance(true);
```

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

## Export pages

If you would like to allow users to export a subset of pages from the document, you should implement `OnExportThumbnailsListener` interface by providing implementation for exporting pages:

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

```csharp
thumbDialog.ExportThumbnails += (sender, e) =>
{
    // Implementation for exporting given pages.
};
```

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

If you set `OnExportThumbnailsListener`, the "Export" menu item will show up in the overflow menu when at least one page is selected.

![](https://653871032-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgjsBtuYmcKhWOdM9VCg4%2Fuploads%2Fgit-blob-d98f6371d28779827fe3922bfef59bcf0e10172f%2F27a1c3268ecd4bd3414fcac62d4851246337cfdb-1080x2160.png?alt=media)

## Dialog callbacks

If you want to be notified when the thumbnails view dialog fragment is dismissed, implement `OnThumbnailsViewDialogDismissListener` interface. Also, if you want to be notified when the user attempts to edit pages while the document is read only you should implement `OnThumbnailsEditAttemptWhileReadOnlyListener` interface:

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

```csharp
thumbDialog.ThumbnailsViewDialogDismiss += (sender, e) =>
{
    // Handle viewer when the thumbnails view dialog is dismissed.
};
thumbDialog.ThumbnailsEditAttemptWhileReadOnly += (sender, e) =>
{
    // Show message when user attempts to edit pages of a read only document.
};
```

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


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