This guide examines the Content Accessibility Guidelines or WCAG The four principles of WCAG are perceivable, operable, An interactive checklist of all WCAG and success criteria. Explore all. Improves text and layout adaptability. Avoids unintended activation of device sensors. WCAG AA Checklist (PDF) WCAG AA Guide (PDF) Note that WCAG AA includes WCAG AA (success criteria) +additional AA success criteria added in version for a total ofsuccess criteria or requirements. Extends contrast requirem