Navigations represent transitions from a starting point to a screen, or from one screen to another.
New screens are opened when the user clicks a menu item or a row in a Listview control. Screens can also be opened upon success or failure of an operation.
Screens series are designed from a starting point. Screens appear one at a time on the device. Screens are opened on a stack, and closed in the reverse order in which they were added. Each screen contains one or more controls.