1. Let us navigate to the Manufacturer coupons.
2. Create New Manufacturer coupon and describe it Voucher AED 50.
3. In Use restriction TAB, Type should be used as All, It means it can be used in all the items. Type can be All, Item, Product Group, Item category Special group.
4. Let us configure the Use TAB, Put the Calculation Type as Discount and Discount Type as Discount % and Value as 50.
5. Enable the coupon and apply to the POS client.
6. Once Coupon is applied it will be validated once you do the Totals. Coupon is going to applied to two lines and requires minimum 2 items to trigger the offer. Refer to the below image.
If you are interested in other type of discounts and offer refer to the below link.