This is my case..
but when i close and reopen the headers and columns are different
Thank
Hispa
You can set/save your folder formats here:
Folder > Folder Settings...
But you should read the manual first if you still have so many questions:
https://www.gpsoft.com.au/help/opus12/index.html
And sorry, I don't know if there is a manual in Italian or Spanish language.
And if you need support by the developers you need to link your account: