Oracle Fusion Lease Accounting DFF to Oracle Fusion Receivable Line Transaction Flexfield Config

For Oracle Fusion Lease Accounting, is it possible to add a DFF in the schedule payment (before automatically generate it into AR Invoice), whereas the DFF will be interfaced to AR Invoice Description for the purpose of matching with AR Receipt in later stage?

From my current integrated AR Invoice, there are information carried forward from LA lease payment in the Line Transaction Flexflield, but I would like to know the information being determined and how to add new information into the Flexfield in LA and the limits.

Version (include the version you are using, if applicable): 26C