When you create a payment for a business partner, the journal entry contains only one line for the business partner regardless the number of payment means used.
To reflect the various payment means, and exchange rate differences in the journal entry all you need is to select one check box:
The journal entry created by the payment document contains separate line for each payment means for the business partner.
This option is available for both incoming and outgoing payments.
Available in SAP Business One, version for SAP HANA and SAP Business One. This tip and all the other tips are available on the Tip of the week community page. You can also visit the Implementation Arena for useful implementation tips.