To see the list of your customers, just click on Sales and then Customers.
Your customers list will be displayed like this.
Search criteria will help you to find a specific customer.
Just choose a field in Search criteria, and write some letters contained in your customer criteria. A list of all the customers containing these letters for the criteria will be displayed.
If you double click on a line of the list, you will see the details of one of your customers
You can add or change information in a field and click on update to save your entry