> 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 Test changes on an unpublished theme copy before publishing, and keep a backup of any code you add.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 %}
***
{% hint style="info" icon="headset" %}
**Need help?**
Whether you have a question, run into an issue, or just need some guidance, our support team is here to help.
Chat with us Submit a ticket
{% endhint %}