Open the Stores section and select what you want to add (a store or retail network).
Add the necessary information and save the network.
If you want to add a new store, select the type of network which the store belongs to and click +.
Add the neccesary information and save the store.
Open the Shops section, find the necessary store and click Add in the Format column on the store's page.
Add the necessary information and save the format.