An electronic device: displays a plurality of objects, where two or more of the objects are grouped together in a group of objects and one or more other objects of the plurality of objects are not in the group; detects a first gesture that includes a first press input at a location that corresponds to a respective object in the group. in response to detecting the first gesture, the device selects one or more of the plurality of objects as a set of selected objects. If the first press input had a maximum intensity below a first intensity threshold, the set includes the objects in the group and excludes the other objects that are not in the group. If the first press input had an intensity above the first intensity threshold, the set includes the respective object and excludes one or more objects in the group and the other objects that are not in the group.