The customer’s Shopify Shop uses Layouthub APP to manage templates.To add new module functions, you need to create a Section based on Layouthub. This is a Cross Sell module, which means that you can buy a watch and bundle it with a replaceable strap.
How to Build a Custom Shopify Theme
After you have signed up, Shopify will direct you to the admin screen. You can select the option, “Customize theme.”