WINDOW PROCESSOR

PURPOSE:To automatically perform processing for reducing the size of a window during a period, when it is not necessary for a user to observe display contents, and for returning the window to the original size when it is necessary to observe the display contents. CONSTITUTION:When the execution of a sub routine program READ is completed concerning the window in a normal size displayed at a display part 17, a program control part 18 sets an interruption flag 18-1 and the size of the window is automatically reduced. When the execution of the sub routine program READ is started concerning the window which size is reduced, the size of the window is automatically enlarged to the normal size.