ChromeVox is built into Chrome OS and can be enabled from the login screen by pressing Control-Alt-Z. This section contains information on setting up your ChromeBook and a keyboard reference guide.
This guide walks you through getting started with ChromeVox and Chrome OS out of the box. Though ChromeVox can be enabled right away, there are a few steps to the configuration process and so we recommend that you keep this Getting Started guide handy.
The Chromebook keyboard is slightly different from standard keyboards. This guide will help you understand where to find the keys you need.