The present invention has the objective of providing a method for reducing trouble in creating a seating layout by a method other than with templates. The computer 1 accepts a designating operation on position coordinates forming a base point in the prescribed display area from a user, accepts a designating operation of a direction of generating the seating symbol data from position coordinates as the base point in the prescribed display area, determines a position for displaying the seating symbol data in the prescribed display area, based on the base point and the direction, generates seating symbol data comprising position data representing the position determined, adds to the combination of the seating symbol data composing the seating layout data, and stores thereof in the memory 120, and displays the seating symbol data in the display unit 150 based on position data included in the generated seating symbol data.