Customizing and editing your checkout
You can use the checkout editor to customize and manage the functionality and appearance of your checkout, thank you, order status, and customer accounts pages in a single place that's separate from your theme editor. With the checkout editor, you can customize your branding and add apps to enhance these pages.
To customize the branding of your checkout, you can add your brand's logo, add a background color or image, and change the colors and font on the checkout, thank you, and order status pages. Some of the branding options that you add to your checkout automatically apply to your new customer account pages.
You can also install checkout apps from the Shopify App Store, and then add them to your checkout, thank you, and order status pages using the checkout editor. App developers and Shopify Partners can build apps for you to add additional functionalities to these pages.
For example, you can install an item upsell app, and then add it to your checkout's order summary area to let customers add additional items to their cart during checkout.