To enhance the effect of a production while producing a visual interest through curved arrangement of a character train.

Setting poles and size setting operation points are provided for a virtual linear line segment KS having a length equal to the arrangement reference line, on which character trains are arranged, to set character sizes at the beginning point s, the intermediate point t1 and the ending point e. The poles and the points are extended using the distance L1 between the points s and t1, the distance L2 between the points t1 and e and the lengths of poles Hs, Ht1 and He. Then, the sizes of the characters between the points s and t1 are obtained from the rate of inclination computed by the lengths Hs and Ht1 and the distance L1. Also, the sizes of the characters between the points t1 and e are obtained employing the rate of inclination computed from the lengths Ht1 and He and the distance L2. Then, the characters are arranged on an arrangement reference line RL based on the character sizes obtained above.