There are two ways to edit a discount.
Inline Edit: Go to Prime Exclusive Discount, and choose View Details from the action cell corresponding to the discount you want to edit. Once the discount details open up, click Edit Discount Details or Review Discount link. In Review Discount section, you will be able to edit Discount Type, Discount Amount, and Minimum Price.
Bulk Edit via Upload Spreadsheet: Go to Prime Exclusive Discount, and choose View Details from the action cell corresponding to the discount you want to edit. Once the discount details open up, click Add More Products. You can upload new products and/or updated values of existing product by using the discount upload template spreadsheet. Please note, you must choose “e” in add-edit-delete column to edit existing products.