Thanks for sharing the additional details and the screenshot, which helps clarify the situation.
For the document where alt text is being read twice, even if duplicate Figure tags are not visible in the Tags panel, this can still occur if the same content exists both as visible text and as alternate text. Screen readers will read both the actual text and the alt text, which can sound like duplication. This is common with PDFs created from third-party tools, where captions or headings match the alt text applied to images.
Regarding the “Make Accessible” action in Acrobat, this tool rebuilds the tag structure from scratch and does not retain existing alt text. That is why your alt text was removed. In cases where a document already has partial tagging, it is generally better to manually fix the existing tags rather than use auto-tagging.
For the second document, if the Tags panel in Acrobat shows no tags, then the PDF is not tagged and would not meet accessibility requirements under PDF standards. Some third-party tools may report a pass, but Acrobat relies on a proper tag structure for accessibility. In this case, you would need to run “Autotag Document” in Acrobat, then manually review, add alt text, and correct the reading order.
To summarize the next steps:
- Review whether duplicate reading is caused by visible text plus alt text, and adjust alt text if needed.
- Avoid using “Make Accessible” if you want to preserve existing work.
- For untagged PDFs, use Autotag Document and then manually refine tags and add alt text.
I hope this helps clear up the behavior.
Best practice: Make a copy of the document before you try auto-tagging or making any changes to the tag structure.
Also, have you tried the Cloud-based auto-tagging feature?
- Create a copy of your document
- Launch Acrobat > Menu > Preferences > Accessibility > Other Accessibility options
- Check “Enable Cloud-based auto-tagging” for accessibility
- Click Ok
- Relaunch Acrobat (optional)
- Open the document > Tools > Prepare for Accessibility
- Click “Automatically tag PDF.”
- Once done, save the document and check.
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