Adobe Reader: Accessibility Features
Acrobat Reader provides several preferences that make the reading of PDFs more accessible for visually impaired and motion-impaired users. These preferences control how PDFs appear on the screen and read by a screen reader.
Most preferences related to accessibility are available through the Accessibility Setup Assistant, which provides onscreen instructions for setting these preferences. Some preferences that affect accessibility aren’t available through the Accessibility Setup Assistant including preferences in the Reading, Forms, and Multimedia categories. You can set all preferences in the Preferences dialog box.