12.10 - How do I get LibreOffice to make titles for columns such that as I scroll down I see the titles instead of "A,B,C,..." for columns? - Ask Ubuntu
LibreOffice: Relative and Absolute Reference
libreoffice calc - Make some rows read-only - Super User
Password protect a sheet, cells and file in LibreOffice Calc - YouTube
dniM ruoY nepO: Protecting Content in LibreOffice Writer form unpremeditated changes
Protecting cells in a table in LibreOffice Writer - YouTube