Doug Abrams

Reflow Red Flags

Screenshot of “Reflow Red Flags”

WCAG refers to testing viewports at 320 px wide and 256 px high. They chose these dimensions in part because they’re equivalent to a midrange desktop resolution when zoomed to 400%. Whenever you need to dig deeper, you should view the same content on one or two laptops and browser-zoom levels to check the experience at 400%. This will help give you a sense of how users with low vision experience the content on similar devices.