Thank you very much, yes, you're right and I understand that.
My question is, if, for presentation purpose, in Financial Statements, one could setup the report to show all amounts in positive numbers, taking the nature of the G/L Account, like happen in almost every other account system I know, except SAP.
Like this:
http://www.computer-accounting-software-help.com/Example_Income_Statement.html
or
Construction accounting software financial statements
All numbers are shown positive, regardless the report was created taking in consideration the type of the account in order to know what to add or to substract.