The registration/purchase element is a combined element used for guests to register and/or purchase tickets/items or make donations. The default webpage template contains either Registration and/or Purchase pages depending on the one you chose. If you are selling tickets online then this will be one the Purchases page, whereas online registration without a purchase is typically configured on the Register page. Each of these pages contains a registration/purchase element.
Access the Element
Open the page that has the element on it you want to configure.
If you have a Register page and are already registered as a bidder, then the menu link will be hidden. In this case, move the mouse over the page editor icon and click on the Register page in the page list:
The element will indicate if you are already registered, but you can still access the settings.
To access the Settings, move the mouse over the element and click the settings element.
This element is highly configurable, which can be a bit difficult at first.