An electronic device with a touch-sensitive surface and a display detects a gesture on the touch-sensitive surface, including detecting an initial portion of the gesture while displaying a user interface of a first application, and including concurrently detecting a plurality of contacts on the touch-sensitive surface and detecting movement of the plurality of contacts. In response to detecting the gesture: if the gesture includes two contacts, the device performs an operation in the first application; if the gesture includes more than a threshold number of contacts greater than two and the movement of the contacts during the gesture meets first criteria, the device displays a user interface of a second application; and if the gesture includes more than the threshold number of contacts greater than two and the movement of the contacts meets second criteria, the device a home screen user interface.