Abstract: A current image-sensing area of a camera is displayed as a first frame, and a potential image-sensing area obtainable by panning/tilting the camera at an image-sensing magnification is displayed as a second frame. To control panning/tilting of the camera, a display position of the second frame is changed, and in accordance with the changed display position, control data is transferred to the camera.

Abstract: A monitor system is provided a display for displaying images from a plurality of image transmission sources connected to a network and a control unit for limiting the number of images displayed as an apparatus suitable for the monitor system which control the transmission sources while utilizing maps indicating arrangement information of the transmission sources so that the operability of the monitor operator is improved and the monitor system is easy to use. A monitor terminal having a map window for presenting status of areas in which video cameras as the image transmission sources are arranged and an image display window for displaying a plurality of video camera images includes a unit for changing the number of displayed images in accordance with a size of the image display window.