> 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/viewer/direction.md).

# Change Vertical and Horizontal Scroll Direction in Android PDF Viewer

Scroll through PDF documents with ease using PDFViewCtrl by changing scrolling direction. Enable vertical scrolling for continuous reading or horizontal scrolling for a page-by-page view. See how it w

When scrolling through pages of a document in [`PDFViewCtrl`](https://sdk.apryse.com/api/android/javadoc/reference/com/pdftron/pdf/PDFViewCtrl.html), the scrolling direction can be changed by [setting the page layout mode](/android/viewer/view-mode.md).

## Vertical scrolling

Vertical scrolling mode (also known as continuous mode) can be enabled by setting the page presentation mode to either [`SINGLE_CONT`](https://sdk.apryse.com/api/android/javadoc/reference/com/pdftron/pdf/PDFViewCtrl.PagePresentationMode.html), [`FACING_CONT`](https://sdk.apryse.com/api/android/javadoc/reference/com/pdftron/pdf/PDFViewCtrl.PagePresentationMode.html), or [`FACING_COVER_CONT`](https://sdk.apryse.com/api/android/javadoc/reference/com/pdftron/pdf/PDFViewCtrl.PagePresentationMode.html).

Here's what setting the page presentation mode to vertical scrolling looks like:

![](https://226546913-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0QItsdFBmuuL9ezHimHy%2Fuploads%2Fgit-blob-bb57a00c5e5b24f8cf8494dae5947a774fcaef8e%2F1f698d6dd0736191a127e5f361af1cf17f64f213-600x1200.gif?alt=media)

{% tabs %}
{% tab title="Java" %}
{% code lineNumbers="true" %}

```java
// with PdfViewCtrlTabHostFragment2 
PdfViewCtrlSettingsManager.updateViewMode(
    activity, 
    PdfViewCtrlSettingsManager.KEY_PREF_VIEWMODE_CONTINUOUS_VALUE
); 

// with PDFViewCtrl 
pdfViewCtrl.setPagePresentationMode(
    PDFViewCtrl.PagePresentationMode.SINGLE_CONT
);
```

{% endcode %}
{% endtab %}

{% tab title="Kotlin" %}
{% code lineNumbers="true" %}

```kotlin
// with PdfViewCtrlTabHostFragment2 
PdfViewCtrlSettingsManager.updateViewMode(
    activity, 
    PdfViewCtrlSettingsManager.KEY_PREF_VIEWMODE_CONTINUOUS_VALUE
) 

// with PDFViewCtrl 
mPdfViewCtrl.pagePresentationMode = PDFViewCtrl.PagePresentationMode.SINGLE_CONT
```

{% endcode %}
{% endtab %}

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

```csharp
// Xamarin.Android
// with PdfViewCtrlTabHostFragment2
PdfViewCtrlSettingsManager.UpdateViewMode(activity, PdfViewCtrlSettingsManager.KeyPrefViewmodeContinuousValue);
// with PDFViewCtrl
pdfViewCtrl.PagePresentationMode = PDFViewCtrl.PagePresentationMode.SingleCont;
```

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

## Horizontal scrolling

Horizontal scrolling mode (also known as non-continuous mode) can be enabled by setting the page presentation mode to either [`SINGLE`](https://sdk.apryse.com/api/android/javadoc/reference/com/pdftron/pdf/PDFViewCtrl.PagePresentationMode.html), [`FACING`](https://sdk.apryse.com/api/android/javadoc/reference/com/pdftron/pdf/PDFViewCtrl.PagePresentationMode.html), or [`FACING_COVER`](https://sdk.apryse.com/api/android/javadoc/reference/com/pdftron/pdf/PDFViewCtrl.PagePresentationMode.html).

Here's what setting the page presentation mode to horizontal scrolling looks like:

![](https://226546913-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0QItsdFBmuuL9ezHimHy%2Fuploads%2Fgit-blob-8340082568d8ca69e6727347377b099f34e9e0a9%2F811227718b1a22af1fbdc27ae9f4ff5f9d33b11f-600x1200.gif?alt=media)

{% tabs %}
{% tab title="Java" %}
{% code lineNumbers="true" %}

```java
// with PdfViewCtrlTabHostFragment2
PdfViewCtrlSettingsManager.updateViewMode(activity, PdfViewCtrlSettingsManager.KEY_PREF_VIEWMODE_CONTINUOUS_VALUE);

// with PDFViewCtrl
pdfViewCtrl.setPagePresentationMode(PDFViewCtrl.PagePresentationMode.SINGLE_CONT);
```

{% endcode %}
{% endtab %}

{% tab title="Kotlin" %}
{% code lineNumbers="true" %}

```kotlin
// with PdfViewCtrlTabHostFragment2
PdfViewCtrlSettingsManager.updateViewMode(activity, PdfViewCtrlSettingsManager.KEY_PREF_VIEWMODE_SINGLEPAGE_VALUE)

// with PDFViewCtrl
mPdfViewCtrl.pagePresentationMode = PDFViewCtrl.PagePresentationMode.SINGLE
```

{% endcode %}
{% endtab %}

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

```csharp
// Xamarin.Android
// with PdfViewCtrlTabHostFragment2
PdfViewCtrlSettingsManager.UpdateViewMode(activity, PdfViewCtrlSettingsManager.KeyPrefViewmodeSinglepageValue);
// with PDFViewCtrl
pdfViewCtrl.PagePresentationMode = PDFViewCtrl.PagePresentationMode.Single;
```

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


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