When you print invoices, credit memos, and so on, it is important to choose the correct printer. You use the Printer Selection table to control this. In this table you can assign certain printers to certain users and/or reports so that the Invoice report, for example, is always printed on printer X. You can also specify that only user Y will always print credit memos on printer X, for example.
Once you have set up the connections among users, reports and printers, the program will automatically use the information to direct future printouts.