Random number field in NFe

Hi All,

We have an issue while creating NF-e document using transaction J1B1N.

As per the SAP standards in NF-e Data tab the Random no. & Check Digit are generated automatically by the system.

But we need to keep these field blank for manual entry by end users. Is there any user exit/field exit/functional module through which we can keep the fields blank & editable for user entry??

Thanks in advance.

Thanks,

Pradyot Abhay