Hi,
FB15 same as F-32 but in F-32 we have vertical view of open items. In FB15 it is horizantal view. We have to select both open items (Dr & Cr) and click on assign then save the transaction. After that click on clear system go back to T-code F-32 and post the document as per the configuration FBKP - Clearing procedure.
here we are using to clear the debit and credit line items manually,
if we force to clear different credit and debit value, its automatically move to F-32 screen
So literally the logic is manual, and not able to define the clearing based on OB74 configuration too.
regards,
Sanju M S