Once you made changes to one of your saved designs, or created a new design, you will need to republish the design on all your listings.
To update a design on all listings follow these steps:
Visit your Listings tab.
Select all the listings and click on "Select all your eBay items".
Click on Bulk Actions and choose Apply Template.
Choose the template from the drop down menu and click on Apply to eBay.
5. That's it! Within minutes all your listings' design will be updated.