> 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/reflow.md).

# Reflow document content in Xamarin

Learn how to implement reflowable layout for PDF documents in Xamarin.iOS. Create a user-friendly experience with swipe navigation through pages. Customize text scale and more advanced features. The A

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

Reflow makes the document more flexible and easier to read, especially on small devices. Apryse is able to extract the reflowable layout of each page of a PDF document as an HTML file. In this guide, we explain how simple it is to show a widget that allows the user to swipe left or right through the pages of the document to see reflowable document pages.

The [`PTReflowViewController`](https://sdk.apryse.com/api/xamarinios/tools/api/pdftron.PDF.Controls.PTReflowViewController.html) class allows the user to flip left and right through the reflowable layout of pages in a certain PDF document.

![](https://653871032-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgjsBtuYmcKhWOdM9VCg4%2Fuploads%2Fgit-blob-f106f933af484a4c140bcdf32491ae9b76921a50%2F858672a1b898f759f5072510e7d0fad1e9e3faf6-600x1068.gif?alt=media)

*The reflow 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 a reflow view controller

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

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

```csharp
var reflowViewController = new PTReflowViewController(mPdfViewCtrl);
var navigationController = new UINavigationController(reflowViewController);
this.PresentViewController(navigationController, true, null);
```

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

That is everything you need to have a simple reflow control. Next, we will go through advanced features.

## Customization

It is possible to change the scale of text in the reflow view controller. The default text scale is 1.0 and can be changed with the [`scale`](https://sdk.apryse.com/api/xamarinios/tools/api/pdftron.PDF.Controls.PTReflowViewController.html#pdftron_PDF_Controls_PTReflowViewController_Scale) property.

Similar to the [PDFViewCtrl ](/xamarin/guides/ios/basics/open.md#view), tapping on the left or right edge of the reflow view controller can change the page. This behavior is disabled by default and can be enabled with the [`turnPageOnTap`](https://sdk.apryse.com/api/xamarinios/tools/api/pdftron.PDF.Controls.PTReflowViewController.html#pdftron_PDF_Controls_PTReflowViewController_TurnPageOnTap) property.


---

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