in the link below you find what i'm talking about, thanks
http://imgur.com/KQEPRmx
Odoo is the world's easiest all-in-one management software.
It includes hundreds of business apps:
in the link below you find what i'm talking about, thanks
http://imgur.com/KQEPRmx
In menu /Settings/Technical/Sequence & Identifiers/Sequences you find sequence "Sale Order" and modify it.
Or in menu /Accounting/Configuration/Journal/Journals you find Jorunal "Sales Journal" and modify "Entry Sequence" (or create new one with other format)
thanks, very helpful