> 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/features/sticky-add-to-cart.md).

# Sticky add-to-cart

A slim buy bar that slides into view once the shopper scrolls past the main buy area, and stays pinned. It carries a product thumbnail, the price, an optional variant and quantity picker, and the Add to Cart button. It can sit within the page width, stretch across the full browser width, or float as an overlay.

![Sticky add-to-cart overview](/files/UN6iKY9RiF59I1P2A8KD)

## How to turn it on

1. In the theme editor, open the product template → **Product information** section → [**Product details**](/helix/product-page-sections/product-information/product-details.md#sticky-add-to-cart) block.
2. Add the **Sticky add to cart** block inside it, or inside a **Group** within it.
3. Choose a **Layout style**.
4. Turn **Show variant selector** and **Show quantity selector** on or off.
5. Adjust the thumbnail width and button height to suit your product page.