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C
C225172330nhr
Participant
January 5, 2022
Question

Autotag of a Latex PDF leads to removed characters and added brackets

  • January 5, 2022
  • 1 reply
  • 712 views

Hi community, 

 

My Latex document contains formulas, and these seem to be the source of errors during autotagging. 

This might be a bug in Acrobat. Perhaps someone here has a solution for me. 

 

I have attached a minimal example, both in form of the source document and as the result. The result has

1) Characters missing 

2) Randomly added big opening brackets

 

To replicate: open the input PDF, start the 'autotag' feature. The result gets apparent only after scrolling away and back. However, the errors get saved with the file. The added brackets are not 'editable' and I have not found a way to remove them. 

 

Any help is appreciated!

 

    1 reply

    C
    C225172330nhrAuthor
    Participant
    January 19, 2022

    *bump*

    Is there anyone who has experienced this before? No big Latex -> PDF -> accessibility fans out here? 🙂

    Thanks!

    Q
    quirky_life7999
    Participant
    July 24, 2025

    I know it's been a while but did you manage to solve the issue? I am facing the same problem. Thanks.

    C
    C225172330nhrAuthor
    Participant
    July 24, 2025

    I managed to circumvent, not solve. 
    I had also tried to file a bug, but I suppose this constellation is not common enough (and the buggy behaviour does not occur often enough) to warrant an investigation and fix. 

    To circumvent: I think 2 bracket sizes are fine (or perhaps only the smallest). Don't use any others. Creating a test PDF is quite easy, eg. put all the brackets in all the sizes into a page, each into individual lines. My document thankfully didn't heavily rely on bracket sizes for readability, so I was able to use only the ones "allowed". 
    I suppose some adjustment of your formulas might be required, as Latex sometimes choses the size of brackets for you...
    Wishing you the best of luck!

    PS: alternatively, I had thought of creating a 'normal' but untagged version of the document, as well as a correctly tagged, but bracket-reduced document, and offering the reader both. Not pretty, but perhaps better than the alternative...

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