> For the complete documentation index, see [llms.txt](https://docs.manifold.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.manifold.xyz/manifold-for-developers/shopify-merch-bridge/reference/custom-themes.md).

# Custom Themes

If you are a Shopify developer and wish to add the Manifold Merch Bridge to your own custom theme, please see the README and merch\_bridge.diff files in our [themes repository](https://github.com/manifoldxyz/manifold-templates/tree/main/shopify/themes) to get a sense of the modifications that need to be made.

At the core, two **snippets** are added:

1. snippets/manifold-campaign-widget.liquid
2. snippets/manifold-checkout-widget.liquid

These two **snippets** add the basic product page and checkout functionality to the theme.

With these snippets added, they still need to be rendered into the appropriate product and checkout pages, as well as replace certain default elements on the theme (e.g. the 'Add To Cart' and 'Checkout' buttons). Those are changes to the various **sections** in the theme.