> 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.md).

# Custom

Blocks for advanced, code-level customization.

| Block                                                        | Description                                                                                        |
| ------------------------------------------------------------ | -------------------------------------------------------------------------------------------------- |
| [Custom Liquid](/helix/theme-blocks/custom/custom-liquid.md) | Insert custom Liquid, HTML, or app snippets to create customizations beyond the built-in settings. |