> 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/annotation/read-only-mode.md).

# Read only mode

Learn how to set user permissions to prevent PDF editing in Xamarin.Android viewer. Disable annotation creation, editing, form filling, signing, and more with this tutorial. The Apryse Xamarin SDK str

You can set user permissions to prevent the document from being edited with the use of tools.

## Read only mode for Xamarin.Android viewer

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

Actions such as annotation creation, editing, form filling, signing, and link following etc. are enabled by default. It is possible to selectively enable parts of such functionality as well as completely disable all interactive features.

## Disable PDF editing

To disable PDF editing, such as adding annotations, filling form fields or signing, use [`ToolManager.ReadOnly`](https://sdk.apryse.com/api/xamarinandroid/tools/api/pdftron.PDF.Tools.ToolManager.html#pdftron_PDF_Tools_ToolManager_ReadOnly).

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

```csharp
toolManager.ReadOnly = true;
```

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

where `toolManager` is the instance of `ToolManager`.

## Disable all user interaction

To disable all user interaction on `PDFViewCtrl`, such as selecting text, selecting annotations, do not associate a `ToolManager` with a `PDFViewCtrl`. For example, do not use `ToolManagerBuilder` to create a `ToolManager` object.

## Disable annotation creation and editing

To hide all UI widgets that are associated with creation and editing of a particular annotation type, see: [Disable annotation creation and editing ](/xamarin/annotation/disable-annot-create-edit.md).

## Disable other functionality

To disable functionality that is not directly tied to annotations, see: [Disable functionality ](/xamarin/annotation/disable-annot-create-edit.md#disable-functionality).


---

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