I have an editable pdf libreoffice document. Is there a way to secure edits?
When export a document as pdf you see one table (pdf options) go to secure page and make your choice about secure edits.
You can make it only visible with out can anyone copy from your pdf
To expand a bit on dimzev’s excellent answer, to change PDF conversion setting before making a PDF, instead of using the PDF icon in the tool bar, Click on File at the top, then click on Export as PDF. That will then bring up the settings window.