In one embodiment, a computer readable storage medium is provided for storing one or more programs, the one or more programs comprising instructions which, when executed by an electronic device with a display and a touch-sensitive surface, cause the electronic device to: display a screen on the display; while displaying the screen, detect a first input by a first contact on a first icon that meets application-launch criteria; in response to detecting the first input on the first icon that meets the application-launch criteria, replace the screen with a first user interface of a first application that corresponds to the first icon; while displaying the first user interface, detect a second input by a second contact that includes movement across the display in a first direction; and in response to detecting the second input, perform an operation.