How to Fix Acrobat Autotagging Mismatched Tags and Reading Order
Question details
Users experience inconsistent accessibility tags and reading order classifications after running the autotagging feature in Acrobat.
- Product
- Adobe Acrobat Pro DC
- Device & OS
- Windows 10
- Scenario
- Creating accessible PDFs and verifying the reading order for compliance.
- Observed behavior
- The Tags panel, Reading Order tool, and Content panel show mismatched classifications. For instance, headings may appear as paragraphs when read by the NVDA screen reader, requiring extensive manual correction.
Before attempting to reorganize or delete document tags, save a separate backup copy of your original PDF so you can revert if the structural changes break the document.
Manually Correct the Mismatched Tags
Compare the different accessibility panels and manually edit the tag types to ensure consistent classification and screen reader compatibility.
Acrobat's autotagging feature uses automated heuristics to guess document structure, which often struggles with complex layouts. To achieve WCAG and ISO 14289 compliance, you will need to manually review and override these automated classifications.
Navigate to View > Show/Hide > Navigation Panes > Tags to reveal the document's underlying tag structure.
Open the Reading Order tool by navigating to Accessibility > Reading Order. Place it beside the Tags panel to identify where the visual layout tags mismatch the reading order.
Right-click the incorrect element in the Tags panel, select Properties, and change the Type to the proper structural element (e.g., Heading 1, Paragraph, Table, or Figure).
Run the built-in Accessibility Checker and read the corrected document using a screen reader like NVDA to confirm the reading order works as intended.
Clear Autotags and Hand-Tag the Document
If the autotagging results are too erratic, deleting all automated tags and tagging the document from scratch is often faster than performing heavy remediation.
Discover a Lightweight PDF and Office Alternative: WPS Office
While Adobe Acrobat handles intricate accessibility tagging, WPS Office offers a free, lightweight, and highly compatible alternative for your everyday PDF reading, editing, and format conversion needs.
- 1. Download and Install: Visit the official WPS Office website to download the free application for your PC or mobile device.
- 2. Open Your PDF: Launch WPS Office and click on 'Open' to select and instantly load your PDF document.
- 3. Edit and Save: Use the streamlined PDF tools to highlight text, modify pages, or convert the document, then save your changes.
Frequently Asked Questions
Why do my PDF headings appear as paragraphs when read by NVDA?
This occurs because Acrobat's autotagging engine misinterprets the visual formatting of the text and incorrectly assigns standard paragraph tags (<P>) to text that should be a heading. You must manually change the tag type to a heading tag (<H1>, <H2>, etc.) in the Tags panel.
Should I always use autotagging in Adobe Acrobat?
Autotagging is useful for very simple, text-heavy documents. However, for complex layouts with tables, figures, and sidebars, it is considered unreliable. For intricate documents, hand-tagging from the start is often more efficient than correcting autotagging errors.
How can I report autotagging bugs or inconsistencies?
You can report specific autotagging failures and mismatches directly to the Adobe Acrobat development team by filing a bug report at Acrobat.UserVoice.com.
