In previous versions of Flash, the only way to set columns of vertical characters was to create a text box that was one character wide. To make vertical text read across several columns, you needed a separate box for each column. Flash MX lets you change the direction in which text flows in static text boxes to create vertical text that flows automatical y from column to column. You determine whether the columns read left to right (as they do in English) or vice versa (as required for, say, Japanese text).
You set the text-flow direction in the Property Inspector.