I want to customize my header for quotations and invoices, modifying the logo size, the tag line position. I thought that I could do it through Society settings but it only allow me to edit the RML headers but not the PDF headers. I tried to modify res.company report type to PDF but it doesn't work. I tried to modify sale.order report.type to RML but it doesn't work too.

--> So, any idea about where can I find a file to edit and customize the headers of the PDF reports please ? (NB : it doesn't seems to be in report_saleorder.xml)

In my contry I emit quotations and invoices in XPF (my currency) but I need to emmit quotations and invoices in €, can someone explain me how to do it ?