Abstract: An image data obtaining section reads out map information displayed in a display device from a map information storage section and converts the map information into image data so as to cause an image data storage memory to store the image data, and a changing display control section reads out the image data and causes the display device to scale down or scale up the image data, and a determined size information generation section reads out the map information from the map information storage section and converts the map information into determined size information by adjusting a scale-down or scale-up factor of the map information to a display scale factor specified in a scale-down or scale-up determination instruction given by a user, and a determined display control section causes the display device to display the determined size information, thereby realizing an information display control device which can convert information displayed in the display device into information, which is accurately displayed a

Abstract: A data processor with rotatable display includes a display unit having a rectangular display surface rotatable to either a vertically elongated position or a laterally elongated position, and a control unit for setting an onscreen display format presented by the display unit to either a vertically elongated format or a laterally elongated format. The control unit stores the onscreen display format displayed at the time the data processor is turned off. Then when the data processor is later turned on, the stored onscreen display format is used.