You can create customer from Income/Customer or Income/Csutomer Invoice/Create New Invoice/Create New Customer
- click at Income/Customer/Add new record.
- key in the customer account code: ‘da001’ d-debtor, a-the first alphabet of the customer name, 001- the serial number
Press [Enter] to submit 
- key in the details, press the [Enter] key to submit when cursor is at any of the input box.
