Dear Tom,

please note that I want to make an invoice report so that the customer name ,customer id , invoice QR code, sales representative number, sales representative name and other columns appears in the header only ,the details of the invoice which includes item number ,name ,quantity , price ,... appears in the detail section

this is a very simple task in report builder 6i , i am new to apex and i do not know how to make this master detail report

there is only 3 columns allowed as a break columns , and the header is not friendly looking.

i need to customize the classic report in apex to be a master detail report

i will appreciate your help

Best Regards