---
title: Customize line items in Checkout and Customer Accounts order summary using new Checkout Branding API settings - Shopify developer changelog
description: Shopify’s developer changelog documents all changes to Shopify’s platform. Find the latest news and learn about new platform opportunities.
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[Back to Developer changelog](https://shopify.dev/changelog)

December 6, 2024

Tags:

* Admin GraphQL API
* 2025-01

# Customize line items in Checkout and Customer Accounts order summary using new Checkout Branding API settings

**As of Dec 4th, 2024**, you can use the settings under checkoutBrandingInput (see: merchandiseThumbnail) in the Checkout Branding API to modify the appearance of line items in Checkout and Customer Accounts order summary for Shopify Plus merchants.

These line-item customizations include the ability to configure custom aspect ratios for product thumbnails, adjust image fit, and modify the background color of quantity badges. 

Note: The aspect ratio setting is only available on the current unstable release. 

Learn more under [checkoutBrandingInput](https://shopify.dev/docs/api/admin-graphql/2025-01/mutations/checkoutBrandingUpsert#argument-checkoutbrandinginput) in the Checkout Branding API documentation.