DEVICES, METHODS, AND GRAPHICAL USER INTERFACES FOR MESSAGING

An electronic device displays a messaging user interface on the display, the messaging user interface including a conversation transcript of a messaging session between a user of the electronic device and at least one other user. The device receives a first message within the messaging session from an electronic device that corresponds to another user included in the messaging session; in response to receiving the first message, the device displays the first message in a first message region in the conversation transcript on the display. The device detects a first input by a first contact at a location on the touch-sensitive surface that corresponds to a location of the first message region in the conversation transcript; in response to detecting the first input, the device displays an acknowledgement selection affordance at a location in the messaging interface that corresponds to the first message region. The acknowledgement selection affordance displays a plurality of acknowledgement options. The device detects a second input by a second contact at a location on the touch-sensitive surface that corresponds to a location of a first acknowledgement option in the acknowledgement selection affordance; and, in response to detecting the second input, the device applies the first acknowledgement option to the first message region.