# Quantity Selector
How to display a **Quantity Selector** for each cart item on the Checkout using the **Cart Item Details -> Adjust Quantity** option.
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## Guide
1. Create a new [**customization**](https://admin.shopify.com/apps/dynamic-checkout-customizer/customizations).
2. Select the **Cart Item Details** category.
3. Select **Adjust Quantity**, a cart line details type from the options for displaying the quantity selector on the checkout for each cart item.
4. Select **Render After Each Cart Item** option from the given placement options.
5. Add multiple **conditions** to handle the visibility of the customization on the checkout.
6. Adjust the **Quantity Selector** settings for the Edit Cart Items customization block which includes **link title** for each cart line item.
7. Change the **status** to active to enable the customization block.
8. Adjust the **priority** between 0 to 100 to cover multiple use cases for the customizations.
9. In the **placement** tab, copy the placement ID which will be used on the checkout page.
10. Click on the **Save** button to save the changes.
11. Go to store [**Settings**](https://admin.shopify.com/settings), click Checkout and then select a checkout profile and click on **customize** button to start the customization process.
12. In the [**Checkout editor**](https://admin.shopify.com/settings/checkout/editor), click on the **Add app block** button located at the bottom left corner of the page.
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Make sure you that you have placed the app block at the same placement as selected in the app.
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13. Select the **Checkout - Image Content** app block, drag and drop the app block at the desired location and paste the placement ID to view the customization block.
14. Click on the **Save** button to publish the changes live for the customers.
## Why does it matter?
**Cart Item Details -> Adjust Quantity** customization for displaying Quantity Selector can improve AOV by **10%**.
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