There are several tools available within Adobe Acrobat DC to repair and set the logical tag structure of the document. These include the Touch Up Reading Reader Order tool, the Order panel, the Tags panel, and the Content panel. The Touch Up Reading Order tool provides the easiest visual tool for tagging and setting order. However, it is limited in the types of structural elements that can be set. The Read Out Loud tool, which provides basic text-to-speech access for PDF files, uses the content order found in the Order panel. Assistive technologies such as screen readers, on the other hand, follow the order found in the Tags panel.
When order changes are made in the Touch Up Reading Order tool or the Order panel, order changes are made in both the Tags panel and the Contents panel automatically. Thus the Tags panel and Order panel generally should be synchronized—although they can get unsynchronized. The Touch Up Reading Order tool can be used to quickly determine whether basic structural tags and reading order have been applied to a document.
The Touch Up Reading Order tool displays tagged page content in shaded rectangles. Each rectangle is numbered and indicates the reading order or tag type of the item on the page. The reading order of items can also be verified by displaying the Order navigation panel.
Note: When the PDF document is properly tagged, proceed to “Step 9: Use the Accessibility Checker to Evaluate the PDF File.”
The Tags panel is the most advanced panel for tagging PDF files and provides the most flexibility. Advanced users may primarily use the Tags panel for tagging documents in combination with the Selection tool for text and images. Advanced users will find the Touch Up Reading Order tool useful for working with complex data tables and for selecting and tagging text that spans multiple objects.