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Jimothey
Jimothey
Participating Frequently
January 17, 2023
Answered

How to maintain accessibility and form input values when a pdf is flattened

  • January 17, 2023
  • 4 replies
  • 2527 views

I have a perfectly accessible basic PDF form with 2 fields - first and last name. When I add values into those fields and then flattern the PDF via the preflight option in Acrobat DC pro the entered values are not read by any screen reader and also show as untagged content in the acrobat accessibility check. Strangly, the values are read correctly by Acrobats "Read aloud" tool.

 

Steps to reproduce:

1. Create a basic PDF form with 2 fields

2. Ensure there are no accessibility problems with the document (run and resolve all issues found by the accessibility check tool).

3. Open the PDF in acrobat reader or MacOS Preview and enter values for first and last name. I used Frank and Smith.

4. Save the document

5. Open the document in Acrobat Pro DC and run the accessibility check tool - note that the 2 values are highlighted as failures (untagged content).

6. Flatten the document using the option in preflight

7. Open the flattened document and rerun the accessibility tool - note the input values (Frank and Smith) are still failures under tagged content.

 

I've tested in JAWS, NVDA and Voiceover - none of them read the input values correctly.

 

Is this a known issue or am I missing a step?

 

Many thanks in advance.

This topic has been closed for replies.
Correct answer JR Boulay

Yes, I know about this limitation of Acrobat.

So answer is don't flatten, or use another tool, but I don't know if one exists.

Screens readers should read form fields content.

4 replies

JR Boulay
JR Boulay
Community Expert
January 19, 2023

"Setting the form fields as read-only?"

Yes

Acrobate du PDF, InDesigner et Photoshopographe
    M
    Margaret245424839xyf
    New Participant
    April 15, 2024

    I was having the same issue as Jimothey. We changed the code that is generating the PDF to NOT flatten it, but instead to set the form fields to "read only" after they have been filled. According to this, that should have worked - but it didn't. Form field values are still not being read by screen readers. The form field tags, which are fine in the fillable PDF (and readable by screen readers), get clobbered somehow as a result of this change.......removing the object reference:   

    Any more tips?

    JR Boulay
    JR BoulayCorrect answer
    Community Expert
    January 18, 2023

    Yes, I know about this limitation of Acrobat.

    So answer is don't flatten, or use another tool, but I don't know if one exists.

    Screens readers should read form fields content.

    Acrobate du PDF, InDesigner et Photoshopographe
      Bevi Chagnon - PubCom.com
      Bevi Chagnon - PubCom.com
      Brainiac
      January 18, 2023

      Chiming in with @JR Boulay.

      Flattening a PDF usually removes all of the tags, metadata, alt text, and other accessibility data.

      As JR said, don't flatten if you want the PDF to be accessible.

       

      And don't use Apple Preview because it is not a fully compliant PDF processor; doesn't recognize most of the accessibility features, nor form fields. Technobabble: it isn't fully compliant with the main PDF standard (ISO 32000) nor the PDF/UA-1 accessibility standard (ISO 14289). Translation: it doesn't play by the rules!

       

       

       

      |    Bevi Chagnon   |  Designer, Trainer, & Technologist for Accessible Documents ||    PubCom |    Classes & Books for Accessible InDesign, PDFs & MS Office |
      Jimothey
      JimotheyAuthor
      Participating Frequently
      January 19, 2023

      Hi @Bevi Chagnon - PubCom.com thanks for the reply. This is one thing that I find confusing, so many people say flattening removes tags and accessibility detais but in the many PDFs I've tested that have been flattened in Acrobat Pro DC and those flattened programatically - none have had their tags removed or anything determental to accessibility other than the issue I'm reporting (form values being untagged).

      Jimothey
      JimotheyAuthor
      Participating Frequently
      January 18, 2023

      This article details the same issue, flattening forms fields results in entered values being unable to be read by screen readers https://answers.acrobatusers.com/Accessible-PDF-loses-reading-order-form-fields-flatten-form-q293617.aspx

      JR Boulay
      JR Boulay
      Community Expert
      January 18, 2023

      Never, never, never use MacOS Preview (aka "the PDF killer") to fill a PDF form!

      You should read this article which is still relevant: http://khkonsulting.com/2013/06/preview-app-killer-of-pdf-files/

       

      Acrobate du PDF, InDesigner et Photoshopographe
      Jimothey
      JimotheyAuthor
      Participating Frequently
      January 18, 2023

      @JR Boulay Thanks for the reply however as noted above, the result is the same when either Preview or Adove Reader is used to complete the form. The issue appears to be down to the flattern process (done in Acrobat Pro DC) not tagging the inputted form field values correctly when flattening.

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