Steps：

1. Customer needs to login to their account on the store using email / password. Or, just using email if you are using "New" Shopify customer accounts.
   
   
   
2. Click into shopping cart.
   
   

3. Customers with available store credit will be able to view their wallet widget, click the 'Online Credit' button.

   

   
   

4. Customer can then select the amount of credit they'd like to use, then click the 'Checkout' button.

   
   
   
   

5. Customer will be redirected to checkout page, with store credit applied to their order.