You can run the POS panel using the button "Create New: Point of Sale "or button "POS" on the Sales Receipt toolbar. First of all select a Department press Enter and find a selling product in the Item List. Click <Enter> and add product to Sale Receipt.You can use key Enter for addition and button Minus for subtraction of the items. If you want to edit the receipt you can select row and press Enter or make mouse doubleclick. After creating the receipt you should click the button "Print Receipt" or use key combination Alt+R. Then enter payment amount and press Enter.
If you use bar code scanner click on the button "Enter by code"