Electronic Device With Electrically Controlled Button Indicator

An electronic device may have a housing. Electrical components may be mounted in an interior portion of the housing. A display may be mounted to the housing to display images for a user. A button may have a movable button member that moves inwardly and outwardly with respect to the housing. Control circuitry can use a sensor to monitor button press activity on the button. A visual indicator such as an electrophoretic display or other low power display may be mounted on a protruding portion of the button member. The control circuitry can alter the visual appearance of the visual indicator in response to detection of button presses on the button member. The button may be sealed to prevent intrusion of moisture into the interior of the housing.