Here you will learn how to convert/promote a storefront into a Hub.
Step-by-Step Guide
This guide assumes you have an existing storefront which you need to convert, or promote to become a hub. If you need to create a new storefront to then promote to a hub, follow the steps listed on the How can I create additional storefronts page.
Login to the administration panel of your hub admin.yourwebsiteaddress.com
Click "Settings" on the left hand navigation
In the Storefront Control section enter the domain of the storefront you would like to promote to become a hub
Select Promote to Hub in the Manage pop up menu