> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nomadsarc.app/llms.txt
> Use this file to discover all available pages before exploring further.
# 🔢 Line Item Editor
How to display a **Quantity Selector** for each cart item on the Checkout using the **Template/Custom ->** **Cart Item Details -> Line item editor** option.
## Guide
Create a new [customization](https://admin.shopify.com/apps/dynamic-checkout-customizer/customizations).
Choose Line Item Editor as the customization from available types of Cart Item Detail.
Add one or more **conditions** to control when the quantity selector is displayed during checkout.
Click on Quantity Stepper checkbox to configure relevant action.
Configure the **Priority** (0–100) to determine the execution order when multiple customizations are eligible.
Change the **Status** to **Active** using toggle button to enable the customization.
Copy the generated **Placement ID** from clipboard icon. You'll use this in the Shopify Checkout Editor.
Preview shows , How this block looks like at **CheckOut.**
Click **Save** to store your configuration.
Go to your Shopify [**Settings**](https://admin.shopify.com/settings) → Checkout, select your checkout profile, and click **Edit**.
In the [Checkout Editor](https://admin.shopify.com/settings/checkout/editor), click **Add app block**.
Make sure the app block is placed in the same checkout placement you selected in Dynamic Checkout Customizer.
Select the **Checkout – Edit cart item** app block, and paste the copied **Placement ID**.
Click **Save** in the Checkout Editor to publish the customization.
**Why does it matter?**
The **Cart Item Details → Adjust Quantity** customization lets customers update product quantities directly during checkout, reducing friction and making it easier to increase order quantities without returning to the cart. This can help improve average order value (AOV).
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