Click the "Shop Configuration" text link to setup the details pertaining to the way your shop will communicate with PayPal. (See the PayPal help topic.) In this feature you can choose from a couple of different currencies. By entering your paypal account email address, you will enable the shop to take online orders and new buttons (Add to Cart and View Cart) will appear on the shop.
Click the "Save changes" button when finished.
*Note: You cannot take online orders and payments unless you first enter in a Paypal email address.