er to FIG. 45). [0543] (3) (When the object of the Add operation is an Item) select the position to add from the Insert dialog (upper left hand graph) (refer to FIG. 45). [0544] Up: Item will be added above the Item object for Add operation. [0545] Left: Connection or an Item will be added at the left hand side (upper layer) of the Item object for Add operation. [0546] Right: Connection or an Item