1. An image capturing apparatus comprising: an interface configured to receive a first input corresponding to an initiation of an image capture operation; an image capturing unit configured to capture an image based on the first input; circuitry configured to detect a subject from the captured image; generate a plurality of pieces of composition candidate data by trimming the captured image based on a size and position of the detected subject; sequentially combine each of the plurality of pieces of composition candidate data with the captured image; control a display to sequentially display, at predetermined time intervals, each of the plurality of pieces of composition candidate data combined with the captured image data, wherein the interface is configured to receive a second input corresponding to a completion of the image capture operation, and the circuitry is configured to perform an image taking process of storing one of the plurality of pieces of composition candidate data that is displayed when the second input is received.