Accessibility features can be turned on during first time use on the Welcome Screen, click Accessibility and select the needed features.
To turn on accessibility features after the initial login:
1. Click your picture on the right lower corner of the status area.
2. Select Settings.
3. On the bottom of the page, select "Show advanced settings".
In the Accessibility section, options are shown on the image to the right.
Click in the check-box to enable any of the accessibility options available.
Citations
Images are from Chesterfield County Public Schools, VA.