Turn on accessibility features
Sign in to your Chromebook.
If you're using your Chromebook for the first time, select Accessibility from the Welcome screen when you first turn it on.
Click the status area, where your account picture appears.
Click Show advanced settings at the bottom of the page.
In the "Accessibility" section, select the boxes next to:
Make the cursor bigger (so it's more visible on the screen)
Turn on high contrast mode (makes the screen easier to read)
Turn on spoken feedback (describes what is happening on the screen)
Turn on sticky keys (allows shortcut keys to be typed in sequence, without pressing modifier keys at the same time)
Turn on the screen magnifier (enlarges items on the screen)
Automatically click when the cursor stops (click without using your mouse)
Turn on the on-screen keyboard (shows a keyboard that can be clicked with a mouse)
After you've turned on accessibility features, you can adjust them from your keyboard:
To turn spoken feedback on or off, press Ctrl + Alt + Z.
To magnify the screen, press Ctrl + Alt + Brightness up or Brightness down (or use Ctrl + Alt + two fingers scrolling up or down on the trackpad). To pan the view around, move your cursor past the edge of the screen.