Your solution is indeed the easiest one. However, I think what @umigun wants to achieve is using a easily configurable odt, but in the end have a pdf created from this, e.g. for sending it to customers. Not every recipient has Word/OpenOffice/LibreOffice installed an can read odt files.
I just had a look and there is indeed some information in the French wiki: Générer automatiquement des documents PDF à partir de fichier ODT avec Doliwamp - Dolibarr ERP CRM Wiki
So Chrome and right click to select auto-translate will be your friend (if you are like me and don’t speak any French).
Basically it seems to be relatively easy:
- install LibreOffice
- set variable MAIN_ODT_AS_PDF to the value libreoffice (in home → settings → other)
- and possibly tweak some paths
Since I am only using pdf, I did not test this myself.