what items/items from a category must be in their cart to use this coupon. choose the add more button to add additional items/items from a category to this constraint.
1. make sure that every time you change a coupon setting that you navigate to the bottom of the page and click the "submit" button. if you don’t do this, nothing that you changed will be saved.
2. test the coupon yourself before you make it available for your customers. 