This guide shows you how to use a cart handler to apply a note to a cart. For example, you can enable users to apply a note that requests gift-wrapping. ## Requirements - You've completed the [quickstart guide](/docs/storefronts/headless/hydrogen/getting-started). - You've [set up a cart handler](/docs/storefronts/headless/hydrogen/cart/setup). ## Step 1: Create a cart note form Use the [`CartForm`](/docs/api/hydrogen/latest/components/cartform) component to create a cart note form. The component submits a form request to the `/cart` route's action when users submit an update to the note. You can use this component anywhere in the app.