In the IDE

You added an selectOneChoice component to the ed-o.jspx form. Clicking on the button activates the list of values, from which you can select a value for the field from a user-friendly interface.

In the visual editor, your page should look like this:

When you navigate to the ed-o.jspx page, the LOV should look similar to how it looks in this page in your browser:

At runtime, try out the two new lists; the drop-down selectOneChoice component for the order status and the  CustomerId. Also, try editing an order, and typing an invalid CustomerId (for example, 999) in the CustomerId field. Note the Key Exists validation that you configured earlier prevents you from submitting a change with an invalid CustomerID.