- Allow users to understand the information without having access to the visual medium or when its rendering has been altered.
- Improve the accessibility of content for people with disabilities.
When content is designated by a reference to its form or position on the screen, the information must also be available by another means (markup, text reference, etc.).
This check deals with a wide variety of potential cases, for example on a help page where reference is made to screenshots or even in a text thread where reference is made to an illustration or a table. For all content which depends on the page display to retrieve the information:
- Make sure that references to the shape or position on the screen of content are not the only way to identify the content.
Additional ways can be the explicit reference to an identifier (for example “See figure 1”), a link to an anchor, and so on.