Upon adding MasterDetailPage, it shows an error, "MainPage: requires at least one outbound connection.
I can not go further anymore.
Thanks.
As the error message states, a MasterDetailPage must has at least one connection. So add another page and connect it with the "Navigates To" connection. In the latest update three detail pages are added automatically, so make sure you have the most recent version from the marketplace.
Solved.