Parameter that is used to define, for this entry transaction, if the references for the original document (number and line of the receipt) must be:
hidden:
The fields do not appear in the entry screen but the values are assigned if the return arises from a receipt.
displayed:
The values are assigned to the fields and displayed if the return arises from a receipt picking. These values are not modifiable.
entered:
The values are assigned to the fields and displayed if the return arises from a receipt picking. These values can be entered directly without passing by the receipt picking.