An information-processing device comprises: a reception means for receiving an instruction to display an object image(s) on a display means for displaying an image, via an operation means for receiving an operation; a determination means for determining a number of the object image(s) when the object image(s) is displayed on the display means in response to the instruction; and a display control means for, in a case where the number determined by the determination means is equal to or larger than three and equal to or smaller than a threshold value, arranging and displaying the object images at positions such that, when points respectively determined in adjacent object images are connected by line segments, a figure formed by the line segments represents a polygon having a number of vertices corresponding to the determined number, and, in a case where the number determined by the determination means exceeds the threshold value, arranging and displaying the object images in rows extending in a predetermined direction in a display area of the display means.