PDF Accessibility: The Tags Panel

The Tags Panel displays the primary structure of the document. While the Order Panel provides tools to restructure what content is grouped together, how it is labeled, and when it is read, the Tags Panel gives more granular control over the latter two aspects. The order of the tags is the reading order of the document, moreso than that displayed by the Order Panel, and each tag serves a specific semantic purpose (besides grouping tags like <Part> and <Sect>).

PDF Accessibility

The PDF is a curious case for accessibility. On one hand, it has the potential to be a useful standard for both accessible reading and for printing. On the other, it is rarely utilized in an accessible manner and has many obscure issues and odd behaviors that can lead to problems.

Alt Text

What is alt text?

Alternative text (alt text) is text that describes the content of an image that can be read by a screen reader. It's important to consider what elements of the image are important to include in context. A portrait photo of a historical figure may just need that figure's name as the alt text, while a piece of art may need its primary features denoted, and a diagram or graph may need its contents fully described.