Calculate the discount percentage by activating the function Discount/Multiline Discount. The multiline discount is a way of obtaining a discount when the quantities on one or more purchase lines together, meet the requirement for a discount. The items must be in the same multiline discount group. For further information, see Trade agrmt. (form). In the Discountfield in the Parameters form, you can specify how to apply a multiline discount in conjunction with a line discount.