Although it is easy to check about the heading of main content, there are occasions where a non-display headline is placed in the navigation portion other than the main text. It may be overlooked inadvertently as it is a hidden place, but please make sure to include the appropriate content. It is good to check off by turning off CSS.
|Principle||Operable||User interface components and navigation must be operable.|
|Guideline||Navigable||Provide ways to help users navigate, find content, and determine where they are.|
|Criterion||Headings and Labels
|The headings and labels explain the theme or purpose.|