Resolution changing device, resolution changing method, and resolution changing program

A resolution changing method comprising:

• acquiring resolution information on a display device that enlarges a received video image by using a predetermined enlargement rate and displays, on a screen, an area of the enlarged video image, which is an area meeting a predetermined display resolution, the resolution information identifying an effective resolution that is a video image resolution that indicates the area of the video image before the enlargement, which is an area to be displayed on the screen;
• and
• changing a resolution of the whole of a computer display to be displayed on the screen to the effective resolution that is identified according to the resolution information acquired by the acquiring unit.

A non-transitory computer readable storage medium storing therein a resolution changing program causing a computer to perform:

• acquiring resolution information on a display device that enlarges a received video image by using a predetermined enlargement rate and displays, on a screen, an area of the enlarged video image, which is an area meeting a predetermined display resolution, the resolution information identifying an effective resolution that is a video image resolution that indicates the area of the video image before the enlargement, which is an area to be displayed on the screen;
• and
• changing a resolution of the whole of a computer display to be displayed on the screen to the effective resolution that is identified according to the resolution information acquired by the acquiring unit.