Tags can be added to untagged documents using Adobe Acrobat Pro DC. There are several ways to do this:
- Autotag the document
- Add tags from the Accessibility Checker results
- Add tags Manually via the Tags panel
- Enable the Accessibility toolbar.
- Click the “Autotag Document” command to add tags to the document.
- Verify the tags in the Tags panel.
Add Tags from the Accessibility Checker Results
When the document is not tagged at all, “Tagged PDF” will be listed as “failed” under the Document tree item.
To add tags to the document in this situation:
- Right click the “Tagged PDF—Failed” tree item.
- Choose Fix.
- Verify tags have now been added to the document in the Tag panel.
- The “Tagged PDF” item should now be listed as “passed” under the Document tree.
When the document was tagged but specific content is still missing tags:
Select “New Tag” from the Object tool in the Tag panel.
Select the type of tag from the New Tag dialog and click OK.
Move the new tag to the location in the Tag tree where the content is missing.
Highlight the missing object in the document pane.
Right-click on the new tag in the tree structure
Choose Create Tag from Selection.
Note: It is useful to check the “highlight content” context menu item. This option will highlight the corresponding item from the tag tree in the document pane with a blue rectangle.
Add Tags Manually via the Tags Panel
With the Tags panel open, select “Add Tags to Document from the Options button, or with the Accessibility panel open in the Tools pane, select the “Add Tags to Document” command (See “Figure 23. Adding Tags to an Untagged PDF File”).
The Recognition Results Report for Adding Tags
If Acrobat encounters potential problems while adding tags to the document, the Add Tags Report opens in the navigation pane. The report lists potential problems by page, provides a navigational link to each problem, and offers suggestions for fixing them. This is similar to the Accessibility Checker Report that is produced when an accessibility full check is run as described in “Step 9: Use the Accessibility Checker to Evaluate the PDF File”.
Remember that the automatically generated Recognition Results report requires human intervention to determine the best solution. For example, the report might state that an element has been tagged as a figure and requires alternate text to make it accessible. However, that figure may be a background design element that doesn’t convey any meaning to the user.
Note: The Add Tags Report highlights tagging-related problems only, and it is a temporary file that cannot be saved. Other accessibility issues, including reading order, can be assessed by using the Accessibility Checker.
Adding tags to a PDF may result in a tag structure that is overly complicated or problematic to fix manually. Specific tags can be removed directly via the Tags panel or via the Touch Up Reading Order tool. When a layout table is used, for example, the tagged table structure should be removed to create a cleaner, simpler tagging structure.