Here is how you can see the order placed by customers(after billing) in customer management:
Step 1: Click on 'Menu' on upper left corner
Step 2: Click on 'Customers Management'
Step 3: Click on the customer name of whose you want to see the orders placed
Step 4: Click on 'View Profile'
Step 5: Click on 'Orders'
Note: Click on 'Load more' to view previous orders
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How to see the transaction history of a customer who are added to customer management?