> ## Knowledge Base Index > Fetch the complete knowledge base index at: https://docs.downpay.app/sitemap.xml > Use this file to discover available pages before exploring further. > Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash). # Cart refresh and add on support Learn how to control Downpay's cart refresh and add on support. --- --- ###### On this page: [Overview](#2-overview) [Disable cart refresh](#2-disable-cart-refresh) [Disable add on support](#2-disable-add-on-support) --- --- ## Overview Downpay has built-in functionality to support: 1. Refreshing cart subtotals to support slower loading apps 2. Addon products that add extra fee products to the cart to ensure deposits are calculated correctly. This functionality is enabled by turning on the Downpay Cart theme extension within your Shopify theme editor. --- --- [Jump to top](#6-on-this-page) ## Disable cart refresh Add the following code in the `` section of theme.liquid or equivalent if you'd like to **remove this functionality ** ```html ``` --- --- [Jump to top](#6-on-this-page) ## Disable Add on Support Add the following code in the `` section of theme.liquid or equivalent if you'd like to **remove this functionality ** ```html ``` --- --- [Jump to top](#6-on-this-page)