Adding a note field to a Shopify product page is a common requirement for many stores — whether it’s for gift messages, engraving text, or special customer instructions.Traditionally, this meant editing Liquid code or installing a third-party app. With Shopify Sidekick, it’s now possible to create a usable product page note field directly inside the theme editor, without touching code.This guide shows exactly how to do it, step by step, and explains where Shopify Sidekick works well — and where its limits are.

Why Add a Product Page Note Field in Shopify?

A product page note field allows customers to leave instructions before checkout, which is often more visible and intentional than a generic checkout note.Common use cases include:

  • Personalization requests
  • Gift messages
  • Special handling instructions
  • Internal order references

From a conversion perspective, placing the note field on the product page also reduces confusion and follow-up messages.

Where to Find Shopify Sidekick in the Theme Editor

Shopify Sidekick does not live on a separate “AI builder” page.
It works inside Shopify’s existing theme editing workflow.To get started:

  • Go to Shopify Admin
  • Navigate to Online Store → Themes
  • Click Customize on your active theme

You are now inside the Shopify theme editor, where Sidekick can assist with generating theme sections.

How to Add a Product Page Note Field Using Shopify Sidekick

Step 1: Open a Product Page Template

Inside the theme editor:

  • Use the page selector at the top
  • Switch to Products → Default product (or the template your products use)

This context matters because Shopify Sidekick reads the current page structure before generating any section.

Step 2: Activate Shopify Sidekick

With the product page open:

  • Click the Shopify Sidekick icon in the editor interface
  • Describe your requirement in plain language

For example:

Add a text input field on the product page so customers can leave a note with their order.

You are describing functionality and layout — not writing code.

Step 3: Review the Generated Product Page Section

Before anything is added, Sidekick will usually:

  • Suggest a new theme section
  • Explain what the section does
  • Indicate where it will appear on the page

At this stage, check:

  • Whether it is a new section or a block
  • Whether the placement makes sense (above or below the buy button)

This review step prevents unnecessary layout clutter.

Step 4: Insert and Customize the Note Field

Once applied, the new note field behaves like a native Shopify section.You can now:

  • Edit the label text (e.g. “Order Note” or “Customization Request”)
  • Change placeholder text
  • Reorder the section within the product page
  • Toggle visibility if supported by your theme

No Liquid files or scripts are required.

Step 5: Test the Product Page Note Field

Before publishing:

  • Preview a product page
  • Enter text into the note field
  • Add the product to cart
  • Proceed to checkout

Confirm that:

  • The note is carried into the order
  • It appears correctly in the order details inside Shopify Admin

Shopify Sidekick connects the input to Shopify’s native order note system, rather than creating a custom data structure.

Limitations of Shopify Sidekick for Product Page Customization

While this approach works well for simple use cases, Sidekick has clear boundaries.It is not suitable for:

  • Mandatory input validation
  • Character limits with enforcement
  • Conditional logic (e.g. per variant)
  • Advanced JavaScript interactions

In these scenarios, a custom theme edit or app is still required.A practical rule of thumb:

Shopify Sidekick handles simple, optional inputs very well — but not logic-heavy customization.

Shopify Sidekick vs Apps or Custom Code

Using Shopify Sidekick for a product page note field means:

  • No additional apps
  • Fewer scripts running on the storefront
  • Cleaner theme structure
  • Faster iteration

However, apps or custom development are better when:

  • Input fields must be required
  • Multiple custom fields are needed
  • The logic affects fulfillment workflows

Final Thoughts on Using Shopify Sidekick for Theme Sections

This product page note field is a good example of Shopify Sidekick’s real value.It does not replace developers.It removes friction from small but meaningful theme edits.For Shopify store owners and operators who want faster page iteration without touching code, Shopify Sidekick is already a practical tool — as long as it’s used within its limits.