Information within reach

Designed for different ways of reading

We aim to make our educational resources usable with a keyboard, on a small screen, and with assistive technology. Our design uses labeled forms, visible keyboard focus, clear headings, descriptive image text, and a link to skip directly to the page content.

Reading tools

You can zoom using your browser. Article guides include links to individual sections, and wide tables can be scrolled horizontally. We respect your device’s reduced-motion preference.

Help us improve

If something is difficult to read or use, let us know. Include the page address, what you were trying to do, and your browser or assistive technology if you are comfortable sharing it.

Last updated October 20, 2026.