You can add a custom header to your checkout pages by going to Sellers > Custom Checkout Banners or by clicking here.
When you upload a checkout banner it will be used on all of your checkout pages unless you have selected a custom product banner for an individual product. If a product banner is uploaded it overrides the checkout banner for any product where there is a product banner.
If you want to add a Custom Product Banner click the add Custom Product Banner link. This opens the link to a list of your products. You can go directly to the Custom Product Banner page here.
In this video, we'll show you how to customize your checkout page with a custom checkout banner.