You can assign a default currency for your customers for ease of use in creating Sales Orders in Katana. This is especially useful when selling to international customers and making sure your default sales price is always converted by the most recent currency rate.
How to add a default currency for my customers?
1. Navigate to the Contacts section, select the "Customers" tab from the table header.
2. Select the currency in the "Currency" field of a customer and this will be set as default for that customer.
When you have added a foreign currency to your customers, you can go ahead and start selling in multiple currencies.