> For the complete documentation index, see [llms.txt](https://script-and-theory.gitbook.io/all-in-one-commerce-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://script-and-theory.gitbook.io/all-in-one-commerce-docs/checkout-blocks/blocks/line-item-edit-and-upsell.md).
# Line Item Edit & Upsell
**Description:**
The Line Item Edit & Upsell block allows customers to modify their cart directly in checkout, enhancing flexibility and improving the shopping experience. Customers can:
**How to Use:**
* Create the Line Item Edit & Upsell block.
* Adjust product quantity (increase or decrease).
* Switch to another in-stock variant without leaving checkout.
* Remove a product from their cart.
* Display dynamic content for each line item, such as personalized messages, promotions, or upsell offers.
**How to Enable:**
* Go into the store customizer
* On customizer select page "Checkout and customer accounts".
* Then you need to "add app block" and search extension "Line Item Edit & Upsell" and add it, also set the settings for this extension block and save button. **Check Screenshots**
* Customize the settings based on your store’s requirements.