Defines an individual screen within an application.
On a Page it's possible to specify a set of controls and a set of actions. The actions are displayed on the Action bar placed at the bottom of the screen. If no actions are specified, the Action bar will not be displayed, and the screen content assumes the full height of the screen. As soon as one or more actions are added, the Action bar will appear.
To specify that an action should appear on the Action bar, rather than in the Action menu, the attached property placement can be used. Please note that the action bar placement property will only be considered at initialization ie. it can only be specified once.