At an electronic device with a touch screen display, display a user interface, where the user interface includes at least two windows of an application, a first icon displayed in association with a first window of the at least two windows, and a second icon at a location different from the at least two windows. While displaying the at least two windows, detect a gesture on the touch screen display. In response to detecting the gesture: in accordance with detecting the gesture on the first icon associated with the first window on the touch screen display, remove from the display the first window of the at least two displayed windows corresponding to the gesture; and in accordance with detecting the gesture on the second icon at the location different from the at least two windows of the application, display a new window of the application on the touch screen display.