A method, comprising: at an electronic device with a display, a touch-sensitive surface, and one or more sensors to detect intensities of contacts with the touch-sensitive surface: displaying, on the display, a user interface that includes one or more user interface elements (602, 604, 606); detecting a contact on the touch-sensitive surface; and, while detecting the contact on the touch-sensitive surface: detecting a first increase in a characteristic intensity of the contact on the touch-sensitive surface to a first intensity value; in response to detecting the first increase in the characteristic intensity of the contact, adjusting a property of a first user interface element of the one or more user interface elements in the user interface from a first value to a second value; after adjusting the property of the first user interface element, detecting a first decrease in the characteristic intensity of the contact; in response to detecting the first decrease in the characteristic intensity of the contact, in accordance with a determination that the first increase in the characteristic intensity of the contact met intensity criteria, the contact intensity criteria including a requirement that the first intensity value is above a respective intensity threshold, maintaining the property of the first user interface element above the first value; after detecting the decrease in the characteristic intensity of the contact and while the property of the first user interface element is above the first value, detecting a second increase in the characteristic intensity of the contact to a second intensity value that is less than or equal to the first intensity value; and, in response to detecting the second increase in the characteristic intensity of the contact, adjusting the property of the first user interface element to a third value that is greater than the second value. displaying, on the display, a user interface that includes one or more user interface elements (602, 604, 606); detecting a contact on the touch-sensitive surface; and, while detecting the contact on the touch-sensitive surface: detecting a first increase in a characteristic intensity of the contact on the touch-sensitive surface to a first intensity value; in response to detecting the first increase in the characteristic intensity of the contact, adjusting a property of a first user interface element of the one or more user interface elements in the user interface from a first value to a second value; after adjusting the property of the first user interface element, detecting a first decrease in the characteristic intensity of the contact; in response to detecting the first decrease in the characteristic intensity of the contact, in accordance with a determination that the first increase in the characteristic intensity of the contact met intensity criteria, the contact intensity criteria including a requirement that the first intensity value is above a respective intensity threshold, maintaining the property of the first user interface element above the first value; after detecting the decrease in the characteristic intensity of the contact and while the property of the first user interface element is above the first value, detecting a second increase in the characteristic intensity of the contact to a second intensity value that is less than or equal to the first intensity value; and, in response to detecting the second increase in the characteristic intensity of the contact, adjusting the property of the first user interface element to a third value that is greater than the second value. detecting a first increase in a characteristic intensity of the contact on the touch-sensitive surface to a first intensity value; in response to detecting the first increase in the characteristic intensity of the contact, adjusting a property of a first user interface element of the one or more user interface elements in the user interface from a first value to a second value; after adjusting the property of the first user interface element, detecting a first decrease in the characteristic intensity of the contact; in response to detecting the first decrease in the characteristic intensity of the contact, in accordance with a determination that the first increase in the characteristic intensity of the contact met intensity criteria, the contact intensity criteria including a requirement that the first intensity value is above a respective intensity threshold, maintaining the property of the first user interface element above the first value; after detecting the decrease in the characteristic intensity of the contact and while the property of the first user interface element is above the first value, detecting a second increase in the characteristic intensity of the contact to a second intensity value that is less than or equal to the first intensity value; and, in response to detecting the second increase in the characteristic intensity of the contact, adjusting the property of the first user interface element to a third value that is greater than the second value.