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How to Add Notes for each cart item on the Checkout using the Custom -> Cart Item Details -> Add Notes option.

Guide

1

Create a new customization

Create a new customization.Image
2

Select Add Notes from Cart Item Details category

Choose Add tags as the customization from available types of Cart Item Detail.Custom Cart Item Details Card Add Notes Focus
3

Configure conditions

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

Configure note settings

Customize the Link Title, Notes Title, and Notes Key for each cart item.Add Notes Notes Settings Focus
5

Add Display Settings

Add Character Counts from Display Settings Add Notes Display Settings Focus
6

Set the priority

Configure the Priority (0–100) to determine the execution order when multiple customizations are eligible.Add Notes Priority Focus
7

Copy the Placement ID

Copy the generated Placement ID from clipboard icon. You’ll use this in the Shopify Checkout Editor.Add Notes Copy Placement Id Focus
8

Preview

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

Save the customization

Click Save to keep your configuration.Add Notes Unsaved Changes Focus
10

Activate the customization

Change the Status to Active using toggle button to enable the customization.Add Notes Toolbar Focus
11

Open the Checkout Editor

Go to your Shopify Settings → Checkout, select your checkout profile, and click Edit.
12

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.
13

Configure the app block

Select the Checkout – Edit cart items app block, and paste the copied Placement ID.Screenshot 2026 10 08 At 16 32 42
14

Publish your changes

Click Save in the Checkout Editor to publish the customization.Swap Clean
Why does it matter?Cart Item Details -> Add Notes customization for adding custom notes can improve AOV by 10%.