Image display device, method of controlling image display device, computer program, and image display system

A method of controlling an image display device comprising:

• generating an integrated image including first display regions where at least a part of a plurality of identification images for distinguishing a plurality of external devices connected to the image display device from one another are displayed as a list and a second display region where a display image, which is an image displayed by one external device selected out of the plurality of external devices, is displayed;
• and
• causing a user of the image display device to visually recognize the integrated image.

A computer program for causing a computer to implement:

• a function of generating an integrated image including first display regions where at least a part of a plurality of identification images for distinguishing a plurality of external devices connected to the image display device from one another are displayed as a list and a second display region where a display image, which is an image displayed by one external device selected out of the plurality of external devices, is displayed;
• and
• a function of causing a user of the image display device to visually recognize the integrated image.