> For the complete documentation index, see [llms.txt](https://modutheme.gitbook.io/helix/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://modutheme.gitbook.io/helix/theme-blocks/custom/custom-liquid.md).

# Custom Liquid

Insert custom Liquid, HTML, or app snippets to create customizations beyond the built-in settings.

| Setting     | Description                                    |
| ----------- | ---------------------------------------------- |
| Liquid code | Your custom Liquid, HTML, or app snippet code. |

{% hint style="warning" %}
Custom code is powerful but unmanaged — errors here can affect how the page renders. Test changes on an unpublished theme copy before publishing, and keep a backup of any code you add.
{% endhint %}