How to create payment for one invoice using Oracle AP

Hi All

At present when we create payment request in AP, the payment is made vendor wise. If vendor has more than one invoice, then all invoices are paid together. Payment Reference number and Paper Document numbers are unique and assigned for each vendor

We are looking for different feature. We will pay multiple invoices for a vendor. But we want to have Payment Reference number and Paper Document numbers separate for each invoice. Basically payment should be invoice wise and not vendor wise. Is there any grouping or other setup to achieve this?

In case anyone knows please let us know.