The Product form is the portion of the product page dedicated to the customer controls, including the add-to-cart (ATC) buttons, quantity and variant selectors, inventory, social sharing buttons, and back-in-stock notification field.
Customize the add-to-cart buttons
Colors for the ATC buttons can be customized in the Colors theme settings.
To modify the text for the ATC buttons, access the Edit languages settings.
Choose a variant option style
For product variants, select an Option style. The two options are Dropdown or Selectable boxes.
Product variants can also be displayed as swatches: Using Superstore's color swatches for product variants
If Shopify's inventory tracking is active in your store, enable Show stock level to display the available inventory for the product.
Then use the slider to adjust the Low stock level threshold.
Inventory display options are only available in versions 2.2.0 and above. To add these to your store, update your theme to the latest version.
Back-in-stock request form
If a product is sold out, enable the Show "back in stock" request form setting to allow customers to provide their email for an update when the inventory is restored.
If a product has multiple variants, the form will only appear when all of those variants are sold out.