To set up your item discounts, select “Batch edit items” from the “Selling” drop-down menu in the upper left-hand corner. Once there, you can scroll down and select the items you’d like to apply the discount to. It should look something like this:
Select your items by clicking the checkbox in the far left column. The items you select will be highlighted in yellow. Scroll back up to the batch editor, and select the last option in the righthand column that says “Apply discount.” Insert your discount percentage and apply the changes. If you're a Gold pro member or higher, make sure you check the box underneath the discount field that says “Apply discount as a visible markdown.” This will show customers that you’ve discounted your item. Learn more about visible markdowns.