Merge Journal Voucher for all AP Invoice and AR Invoices and Receipt and Payaments

Dear All,

When I create a payable 5 Invices today and then Transfer to GL then system creates 1 JV for alll Invoices like :

INV # 1 Expense Accunt DR

INV # 2 Expense Accunt DR

INV # 3 Expense Accunt DR

INV # 4 Expense Accunt DR

INV # 5 Expense Accunt DR

                                      AP Credit

Please any one tell me how the system creates the single invoice by each transactin. kindly let me know which setup is requierd in order to create the single by each invoice.