Reference doc for Transaction in MIGO

hi

i have a question that How to add reference document for transaction in

MIGO in SPRO?

I have tried with spro- MM - INV. MANAGEMENT - ENJOY MIGO SETTINGS -

SETTING FOR TRANSACTION AND REFERENCE DOCUMENTS

here i can only display or change the reference that are already in

system.

Like as per my system it is taking a reference of MATERIAL DOCUMENT for

transaction RELEASE A GR BLOCKED STOCK. i want to add one more

reference for this transaction.

can any one pl. tell me how can i do this?

Thanks

Prasant