I want a flat PDF that I can send to people, that cannot be further edited.
(you know, the original purpose of a PDF)
LibreOffice seems to lack this functionality, regardless of which combination of PDF formats, passwords or settings is used.
The saved file continues to be full of little text boxes, all of which can be edited or deleted.
During saving (FILE / Export As PDF / PDF/A), the PDF Options dialogue (SECURITY tab) says that the form will not be able to be edited:
PDF Options/ SECURITY (tab) / CHANGES (not permitted)
But this seems to be wishful thinking.
Is there another check box that I am missing?