Unceck Nonprinting Characters
Steps to reproduce:
1. Nonprinting Characters are all visible
2. File > Export as PDF
3. Nonprinting Characters disappear
4. To view them you need to go back on Tools > Options > LibreOffice Writer > Formatting Aids and check Paragraph end, Custom hyphens, Spaces, Non breaking-spaces, Tabs & Breaks
Created attachment 52016 [details]
Created attachment 52017 [details]
Known Problem "Bug 40482 - CONFIGURATION: Formatting aids - displayed nonprinting characters become unchecked during PDF export"
Thank you for your attention!
- Reported with Bug Submission Assistant -
*** This bug has been marked as a duplicate of bug 40482 ***