1. A computer-implemented method, comprising: on a portable multifunction device having a touch screen display, while displaying an application interface of an application on the touch screen display, detecting a movement of an object on or near the touch screen display; in response to detecting the movement of the object, translating an application interface region displayed on the touch screen display in a first direction; detecting an edge of the application interface region being crossed while translating the application interface region in the first direction while the object is still detected on or near the touch screen display; and in response to the edge of the application interface region being crossed while translating the application interface region in the first direction while the object is still detected on or near the touch screen display, displaying the edge of the application interface region, and displaying a search input area in an area beyond the application interface region; wherein the search input area is for entering a search query for the application.