Open cash register by clicking Cash reg. in the top menu.  

The list of products is on the left side of the cash register. Add a product to cashier by clicking, enter the product number or read the barcode at the top of the product list.

 

When you have to added the products that you want, you can finish the transaction to clicking Cash Payment or Card Payment button at the bottom of the view.

When you click the Cash Payment or Card Payment -button that opens to Complete payment -window and receipt is printed. In Complete payment -window, you can printing a print copy or send a receipt to the customer's email. Click to green Continue button when everything is ready. After clicking, the cash register is ready for the next transaction.