Product layout
Detail page layouts per assortment or product.
The layout of a product determines how it is presented in the storefront. The layouts are provided by the shopping experiences and can be customised here. By default, there is one layout for all products which is automatically applied when products are created.
You can change the layout without issue. Under "Change layout", first choose the desired layout. You can then further down fill the various fields of the shopping experience for the product with individual content.

The general configuration and management of layouts and shopping experiences is described here.