An electronic device with a display, a touch-sensitive surface, and one or more sensors to detect intensity of contacts with the touch-sensitive surface displays a first user interface of a first software application, detects an input on the touch-sensitive surface while displaying the first user interface, and, in response to detecting the input while displaying the first user interface, performs a first operation in accordance with a determination that the input satisfies intensity input criteria including that the input satisfies an intensity threshold during a first predefined time period, and performs a second operation in accordance with a determination that the input satisfies long press criteria including that the input remains below the intensity threshold during the first predefined time period.