To easily select necessary information out of many pieces of information which are put one over another by displaying virtual planes on a screen at the same time and selecting only specific information out of pieces of information which are displayed one over another through user's operation when the information is selected.
Virtual planes are displayed on the screen at the same time and when information which is displayed overlapping with others, only the specific information is selected out of pieces of information which are displayed one over another through user's operation. Of this device, a display property setting part 4 sets the number of the virtual planes which are displayed at the same time and sets display properties for discriminating the virtual planes. A screen switching setting part 5 sets the time when the display virtual planes are switched according to user's settings and sets the number of planes to be switched. A screen specifying setting part 6 sets alterations of a virtual plane of interest to be displayed by changing the display properties according to the user's specification. A screen display selection part 8 selects only specific information data.
OKAZAKI TETSUO
TONOMURA YOSHINOBU
