Special GL indicator issue

Hello All,

My user wanted to post customer credit memo using special GL indicator. He wanted that the Payment term field to be visible in the document. However, the payment term field is suppressed. The filed Due Date is required. Is this a SAP standard that if we indicate Special GL indicator the Payment Term will be suppressed? Or is there a way to sue special GL indicator at the same time, the Payment Term field is not SUPPRESED (visible)?

Thank you in advance!

Jhero