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davidl56516759
Participating Frequently
May 19, 2025
Answered

Bookmark panel is sometimes stuck at full width

  • May 19, 2025
  • 1 reply
  • 410 views

Panel at right side, which includes bookmarks and page previews, is sometimes stuck at full width and cannot be made smaller by dragging handle.

Correct answer Tariq Dar

Hi @davidl56516759, 

 

Sorry for the troubled experience, and thanks for reaching out. The issue isn't reproducible at our end. 

 

Could you please check if the issue is still reproducible if you open a new PDF document? Also, try repairing Acrobat. To repair, launch Acrobat > Help> Repair installation.

Please ensure your copy of Adobe Acrobat is updated. To check for any pending updates, launch Acrobat > Help > Check For Updates.

 

Let us know how it works at your end.
 

 


~Tariq

1 reply

T
Tariq DarCorrect answer
Legend
May 19, 2025

Hi @davidl56516759, 

 

Sorry for the troubled experience, and thanks for reaching out. The issue isn't reproducible at our end. 

 

Could you please check if the issue is still reproducible if you open a new PDF document? Also, try repairing Acrobat. To repair, launch Acrobat > Help> Repair installation.

Please ensure your copy of Adobe Acrobat is updated. To check for any pending updates, launch Acrobat > Help > Check For Updates.

 

Let us know how it works at your end.
 

 


~Tariq

D
davidl56516759Author
Participating Frequently
May 19, 2025

Repaired and noted that, as you pointed out, probably due to opening PDFs that have been modified in other editors.

AnandSri
AnandSri
Legend
May 20, 2025

Hi @74350!

 

I hope you are doing well, and thanks for sharing the additional details. 

 

When a PDF was edited in another application, it can carry embedded viewer preferences or document-level JavaScript that force the Navigation Pane (bookmarks/thumbnail panel) to open at a specific width—and Acrobat dutifully honors those settings, which is why you can’t drag it smaller. 

 

You may want to recreate the PDF files. Export to a “clean” PDF. Menu → Save as Other → Optimized PDF. In the PDF Optimizer dialog, uncheck “Include User Data” or “Discard Document Information and Metadata”. Click OK, save, and reopen.

Strip embedded viewer prefs & JavaScript via Preflight

  • Open the PDF in Acrobat Pro.
  • Go to All Tools → Print Production → Preflight.
  • In the Preflight dialog, search for “Remove JavaScript” under the Fixups section.
  • Select “Remove all document JavaScripts”.
  • Next, search for “Remove Viewer Preferences” or manually add a second fixup:
  • Under Fixups → Document, choose “Remove embedded viewer preferences”.
  • Click Analyze and Fix, save the PDF, and reopen it. See this article for more details: https://adobe.ly/4dzY1wL

 

I hope this helps.

Thanks,

Anand Sri.

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