Checkpoint 2.7 For author-identified but unsupported natural languages, allow the user to request notification of language changes in content. Checkpoint 7.7 Allow the user to configure structured navigation. Checkpoint 3.8 Allow the user to turn on and off rendering of images. Checkpoint 8.6 Allow the user to configure the outline view. Checkpoint 8.9 Maintain consistent user agent behavior and default configurations between software releases.
Consistency is less important than accessibility and adoption of operating system conventions.
Checkpoint 9.4 Allow the user to configure notification preferences for common types of content and viewport changes. Checkpoint 10.8 Allow the user to configure the arrangement of graphical user agent user interface controls. Checkpoint 10.7 Provide default input configurations for frequently performed tasks.