Visual Presentation
For the visual presentation of blocks of text, a mechanism is available to let users select foreground and background colors, limit line width, avoid full justification, set generous line and paragraph spacing, and resize text up to 200 percent without requiring horizontal scrolling.
In plain language
For blocks of text, people should be able to customize how it's presented: choose their own colors, limit line width, turn off justified text, get generous line and paragraph spacing, and zoom to 200% without needing to scroll sideways.
Why it matters
People with low vision, dyslexia, or other reading difficulties often need very specific visual adjustments to read comfortably — one person's ideal might be different from another's. Giving control over these settings lets each person read in the way that works for them.
In practice
Fails this criterion
A page uses full text justification with no way to turn it off, fixed colors the user can't override, and a fixed-width layout that requires horizontal scrolling when zoomed.
Meets this criterion
The same page uses flexible, relative sizing, doesn't force justified text, respects user and browser color preferences, and reflows cleanly at 200% zoom with no sideways scrolling.
Test it yourself
Try zooming the page to 200% and check if you need to scroll sideways to read a line. Check whether text is justified with no way to turn it off, and whether the site respects custom colors.