Discount Amount
You can specify a discount percentage or amount for each detail on an order, shipment, invoice, credit note, or debit note.
If you override the discount percentage in the amount field, Order Entry displays an asterisk beside the field in the popup detail entry form to show that the amount was overridden.
You can still enter a discount for the whole document, if you like. Order Entry displays the discount amount for the transaction details, as well as the discount for the whole document, on the Totals tab summary.