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How to display a Swap Variant for each cart item on the Checkout using the Template/Custom -> Cart Item Details -> Swap variant option.

Guide

1

Create a new customization

Create a new customization.Image
2

Choose the Swap Variant option

Choose the Swap Variant option from Cart Item Details sectionSwap 6 Cart Item Details
3

Configure display condition

Add one or more conditions to control when the customization is displayed during checkout.Swap 7 Conditional Experience
4

Select Swap Variant

Select Swap Variant from Action Section to enable the relevant action.Swap 3 Swap Variant
5

Set the priority

Configure the Priority (0–100) to determine the execution order when multiple customizations are eligible.Swap 2 Priority
6

Copy the Placement ID

Copy the generated Placement ID from clipboard icon. You’ll use this in the Shopify Checkout Editor.Swap 1 Placement Id
7

Activate the customization

Change the Status to Active using toggle button to enable the customization.Swap 4 Active Bar
8

Preview

Preview shows , How this block looks like at CheckOut.Swap Preview Focus
9

Save the customization

Click Save to store your configuration.Swap 5 Unsaved Changes
10

Open the Checkout Editor

Go to your Shopify Settings → Checkout, select your checkout profile, and click Edit.
11

Add the app block

In the Checkout Editor, click Add app block.Screenshot 2026 10 08 At 16 32 10
Make sure the app block is placed in the same checkout placement you selected in Dynamic Checkout Customizer.
12

Configure the app block

Select the Checkout – Edit cart item app block, and paste the copied Placement ID.Screenshot 2026 10 08 At 16 32 42
13

Publish your changes

Click Save in the Checkout Editor to publish the customization.Swap Clean