First enter the name of the payment type you will be creating the Type Name field, or select an existing type from the list to the left. Key in the exchange rate into the Exchange Rate field (by default this is set to 1). Check the Requires Reference Text box if the payment type you are adding will require a reference (cheque number, for example). Press Add Payment Type to save your changes.
To make changes, double-click the payment type.
If you want to support multiple currencies in the front end when selling, add currency abbreviation here.
You will be able to change the currency in the front end.