In PDF files, tags indicate the structure of documents and define the logic that binds the content together including the correct reading order, and the presence and meaning of figures, which can work better with the assistive technology like screen readers. To check whether a PDF is tagged, navigate to File > Properties > Description > Tagged PDF.
It is recommended that you tag a document when converting it to PDF from an authoring application, but if you do not have access to an authoring application that can generate a tagged PDF, you can tag a PDF any time with Foxit PDF Editor Pro.
To tag a PDF, open the document and click the Autotag Document command in the Accessibility tab. Then the tags of the document are created and you can view the tags in the Tags panel in the navigation pane. If the document already has tags, you’ll be prompted whether to re-tag the document.
To tag form fields in PDF, please click the Autotag Form Field command in the Accessibility tab.
After the tagging completes, a tag recognition report is generated in the Recognition Report panel in the navigation pane. You can use the report as a guide to repair tagging problems.
Tip: In the Tags panel, Ctrl-click the plus/minus sign next to a tag to expand/collapse all the child tags that are nested under it; Ctrl-click the plus/minus sign next to the Tags root to expand/collapse all tags in the tags tree.