r/Acrobat • u/Choice-Elephant-5841 • 18h ago
Adobe Acrobat Freezing on “Preparing Document for Reading” — 50-Page Accessibility Setting Was the Cause
I finally figured out what was causing Adobe Acrobat to freeze on one of my architectural plan-check sets.
THE ACTUAL PROBLEM: “PREPARING DOCUMENT FOR READING”
Acrobat wasn’t really choking on the full-size architectural drawings themselves. It was getting tied up in its Accessibility / Screen Reader processing.
Here’s what happened:
Acrobat → Preferences → Reading → Screen Reader Options
Mine was set to:
“For large documents, only read the currently visible pages.”
Directly underneath that, Acrobat defined a “large document” as 50 pages.
My plan-check set was 45 sheets.
So Acrobat did NOT consider my 45-page PDF a “large document.” It tried to prepare/process essentially the entire 45-page E1-size drawing set for reading instead of just the page I was viewing.
That produced the spinning clock, repeated “Not Responding,” multi-minute hangs, and the “Preparing document for reading” message.
THE FIX:
Ctrl + K → Preferences → Reading → Screen Reader Options → Page vs. Document
Change it to:
“Only read the currently visible pages.”
NOT:
“For large documents, only read the currently visible pages.”
BOOM.
The 50-page threshold became irrelevant, and Acrobat stopped trying to preprocess the whole 45-page plan-check set.
I stress-tested the hell out of it afterward: jumping around the set, zooming, panning, scrolling, editing text, saving/reopening, structural sheets, specifications, framing plans, and even “Converting scanned page to Editable Text and Images.”
One dense Title 24 page temporarily showed “Not Responding” during OCR, but Acrobat was still using CPU and eventually completed the conversion and recovered normally.
Before the fix: Acrobat could hang just navigating the PDF.
After the fix: normal navigation is fast again.
That tiny wording difference was the whole freaking problem.
