1. A method, comprising: at a multifunction device with a touch-sensitive display: displaying a first application view on the touch-sensitive display that corresponds to a first application in a plurality of concurrently open applications, wherein the first application view is displayed without concurrently displaying an application view for any other application in the plurality of concurrently open applications; detecting a first input; in response to detecting the first input: entering an application view selection mode for selecting one of the concurrently open applications for display in a corresponding application view; and displaying in a predefined area images of open applications that correspond to at least some of the plurality of concurrently open applications, wherein the images of open applications are displayed in a three-dimensional stack extending backwards on the display; detecting a gesture on a respective image of an open application in the three-dimensional stack; and, in response to detecting the gesture on the respective image of the open application: displaying a respective application view on the touch-sensitive display for a corresponding application in the plurality of concurrently open applications, wherein the respective application view is displayed without concurrently displaying an application view for any other application in the plurality of concurrently open applications; ceasing to display the three-dimensional stack of images of open applications; and exiting the application view selection mode.