How to add a quantity selector (Line Item Actions) to the checkout

Overview

Adding a quantity selector and line item actions (like removing products) in the checkout enhances user convenience and boosts customer satisfaction. This guide explains how to set up these features in UpsellPlus.

Step-by-Step Guide

If a customer is in your checkout, we want to avoid them having to go back to the cart page to make changes to their cart.

To add a 'remove' button or +/- to your upsells that were added to cart:

Log in to Shopify Admin

Open the UpsellPlus App
Go to Apps in the lefthand menu
Click UpsellPlus from the list of installed apps

Access the Checkout Editor
In your dashboard, go to Settings > Go to checkout editor

Click Add app block



Click Line Item Actions


Save the checkout profile - done!

Now customers can adjust the quantity of line items in the cart when they're in checkout.


You can choose to show a 'remove' button instead of the plus/minus signs:




If you want to only offer the line item actions for products added as an upsell, you can toggle that setting in the checkout editor sidebar:



Key Tips
Test Changes: Always preview and test updates before making them live.
User Experience: Ensure your checkout remains intuitive by keeping modifications simple and clear.

Related Articles
How to Enable Checkout Upsells Using the Checkout Editor
How to Automatically Add a Free Gift to the Cart

Updated on: 11/02/2025