Xcode change preview device

Overview. Views and controls are the visual building blocks of your app’s user interface . Use them to draw and organize your app’s content onscreen. Views can host other views.

Click on the left-most view (i.e. the one in the very back) and you’ll see that Xcode highlights it to indicate your selection. You’ll also see the Jump Bar (just above the Canvas) update to show a UIWindow as the last item — that last item will always reflect the currently selected view and its class type.

Changing the Initial View Controller in Xcode