I have read the answers to all related questions and they always say click on file go to export. I don’t get an export option. Have 4 save options but I need to create the spreadsheet in pdf format so that it cannot be altered by others but can be read.
Which operating system and which LibreOffice version do you use?
You got no menu File -> Export... and/or no menu File -> Export As PDF...? - Hard to believe. This does exist on Windows, Linux and macOS (If you don’t see these menu entries, you might face a defect user profile or you have customized menu entries [through Tools -> Customize -> Tab: Menus]).
