(Please note that this is Chinese Q&A Forum, any threads should be posted in Chinese. However, I will still provide an answer on English based on your initial response.)
Hi, Hary Dan
Welcome to Microsoft Q&A forum.
Sorry for this unwanted experience that you're facing. What you are seeing is almost always caused by Word using different layout rules for “printing output” than for on-screen layout, typically driven by a compatibility option that makes Word consult printer metrics, so the same paragraph can reflow or “snap” alignment differently when rendered for Print Preview or PDF.
Here are some suggestions you can try:
Turn off “Use printer metrics to lay out document” (document-specific)
In Word, go to File > Options > Advanced, then scroll to the bottom to Compatibility options for: pick your current document, expand Layout Options, and clear “Use printer metrics to lay out document”. This matters because when it is enabled Word bases layout on the active printer driver, which can change how list paragraphs are positioned in Print Preview and PDF.
If you cannot find that checkbox in your .docx, expose it via a .doc round-trip
Some builds only surface that option when the file is in older Word format. Save a copy as Word 97-2003 Document (.doc), adjust the compatibility setting there, then save back to .docx. This works because the printer-metrics behavior is controlled by a compatibility flag, not by normal paragraph alignment settings.
Disable print-time scaling that can subtly shift layout
File > Options > Advanced, under Print, uncheck “Scale content for A4 or 8.5”x11” paper sizes”. Scaling is intended to help mixed paper environments, but it can introduce tiny reflow differences that show up most in headings and list formats when printing to PDF.
Force a consistent “printer context” and rule out driver effects
Set Microsoft Print to PDF as the default printer, restart Word, and ensure you are not switching printers between views. Word’s print layout can change with different drivers, and that change is visible in Print Preview and the final output.
Confirm it is not a synced Office profile behavior by testing signed-out mode
Since you already observed the issue appears after your profile loads, do a quick isolation test by signing out of the Office account in Word (the subscription remains valid). If the behavior stops, it strongly points to a roaming, connected-services preference being reapplied rather than a document formatting problem.
Hope this helps. Feel free to get back if you need further assistance.
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