Presenting a plurality of windows on a display of a mobile device can comprise displaying a first window on the display. The first window can be a dual-display window displayed on both a first and second display portion of the display. In response to a touch gesture, a second window can be presented on at least one of the first and second display portions. When the second window is a dual-display window, the second window can be displayed in the first and second display portions. When the second window is not a dual-display window, the second window can be displayed on one of the first and second display portions and a third window can be displayed on another one of the first and second display portions. When the third window is a dual-display window, it can be displayed on the other one of the first and second display portions.