As a short follow-up to the previous series of posts, I wanted to share a bit on detecting where a view is on the screen. That is, a view can be placed anywhere on the screen, which could be on either edge or in the middle (which is demonstrated in the Getting Around tutorial video.) For any given view, the ApplicationView object for which you obtain with Windows.UI.ViewManagement.ApplicationView.getForCurrentView(), its adjacentToLeftDisplayEdge and adjacentToRightDisplayEdge properties tell you whether the view is placed along a screen edge. If, also, the view is full screen, the isFullScreen property will be true as will both adjacent* properties.
It follows, then, that !isFullScreen && !adjacentToLeftDisplayEdge && !adjacentToRightDisplayEdge means that a view is split and is centrally placed.