# Sumatra PDF is a PDF, ePub, MOBI, CHM, XPS, DjVu, CBZ, CBR reader for Windows

This page is outdated. Accessibility support is not complete and therefore disabled.
SumatraPDF prerelease supports experimental UIA accessibility API, which allows for example screen readers to read out loud the selected text in document.

## Accessibility in SumatraPDF plugin

Accessibility features are considered experimental and accessibility is not enabled at the moment in the SumatraPDF plugin.

## Usage

### Microsoft Narrator

- Start Microsoft Narrator
- Start SumatraPDF
- Open document in SumatraPDF
- Select text. Microsoft Narrator will now read out the selected text.

Known issue: Sometimes Narrator does not read the selection. This seems to be a focus related problem and selecting another window and then back the SumatraPDF window may fix the problem.

## Supported configurations

### Supported file types

PDF, XPS, DjVu

### Supported Clients

- Microsoft Narrator

### Unsupported Clients

- NVDA

# Technical Documentation

This section is documentation for SumatraPDF and other developers.

## UIAutomation element structure when a document is loaded

    Window
     |-> FragmentRoot
         Name: "Canvas"
         ControlType: UIA_CustomControlTypeId
          |
          |-> Fragment
              Name: [filename]
              ControlType: UIA_DocumentControlTypeId
              NativeWindowHandle: 0
              Patterns: ITextProvider
                |
                | -> Fragment
                |    Name: "Page 1"
                |    Patterns: IValueProvider
                -
                -
                |
                | -> Fragment
                     Name: "Page n"
                     Patterns: IValueProvider

## UIAutomation element structure when no document is loaded

    Window
     |-> FragmentRoot
         Name: "Canvas"
         ControlType: UIA_CustomControlTypeId
          |
          |-> Fragment
              Name: "Start Page"

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