> For the complete documentation index, see [llms.txt](https://modular.presidiocreative.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://modular.presidiocreative.com/collections/modular-collection-pages/cutline.md).
# Cutline
This feature gives you the option to add a small, unique descriptive text below the product title.
### Set up the metafield definition
To set up a cutline, you need to create a new, custom metafield definition that Modular can recognize.
{% hint style="info" %}
The most important part is to use this namespace and key: `theme.cutline`
{% endhint %}
To start, navigate to your **Shopify admin -> Settings** and choose **Metafields and metaobjects** from the left panel. Next, click on **Products.**
Click the **Add definition** button to begin. Choose a name, we'll use '`cutline`'. Next, we will use a custom namespace. This is **required**.
A crucial step here is to change the **default namespace** (usually called '*custom*') to **`theme` :**
Add a description *(this is optional),* then **Select type**. Next, choose **Single line text** *(it's the default option):*
{% hint style="success" %}
Don't forget to **save** your changes.
{% endhint %}
#### Product setup
Now that our custom metafield has been defined, the final step is to edit any of your products in the **Shopify admin -> Products** and update the new `cutline` metafield.
All you need to do is scroll to the bottom of the product setup page and fill them in:
Don't forget to **save** your product and preview it on any product grid view, such as a collection page.
---
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