How to post a journal entry with more customer items or supplier items or both

[SAPSupport]

I have the requirement as below.
1. to create a customer payment with multiple customer items in debit side, and one G/L entry in credit side. 
2. to create a vendor payment with multiple supplier items in credit side, and one G/L entry in debit side. 
3. to create a payment with supplier items in credit side, and customer items in debit side. 

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[SAPSupport · Accepted solution]

1. Use the app "Clear Incoming Payments".
   Click "Clear Open Items" and enter the company code and one of the customer.
   In tab 'Post on Account', you can add many customer items and in tab 'Post to G/L Account' you can enter one G/L entry in credit side.
2. Use the app "Clear Outgoing Payments".
   Same step as the first one with suppliers.
3. Use the app "Clear Outgoing Payments".
   Click "Clear Open Items" and enter the company code and the supplier.
   Change the 'Journal Entry Type' to ZP.
   In tab 'Post on Account', you can add supplier and customer items.