1. An information processing device, comprising: image displaying means for displaying one or more images on a display screen; track acquiring means for acquiring a finite track at a position designated by a user on the display screen; image selecting means for selecting some or all of the one or more images based on the track acquired by the track acquiring means; and image moving means for moving the image selected by the image selecting means to a position in accordance with an edge point of the track acquired by the track acquiring means.