An electronic device with a touch-sensitive surface, a display, one or more first sensors to detect proximity of an input object above the touch-sensitive surface and one or more second sensors to detect intensity of contact displays a user interface object at a first location. While displaying the user interface object, the device detects a first portion of an input at the first location of the user interface object while the input object meets hover criteria. In response, the device dynamically changes an appearance of the user interface object in accordance with a current hover proximity parameter of the input object. Afterwards, the device detects a second portion of the input at an initial contact location that corresponds to the first location; and, in response, dynamically changes the appearance of the user interface object in accordance with a current intensity of a contact by the input object.