特别提醒:设置完第一个动画之后，一定要点击【添加动画】去加上新的动画，否则会覆盖掉第一个动画。Select the red dot on the vertex → click the trigger button → select Rectangle: Vertex.
TAB → → Select the first layout of the slide master → Insert TAB → Art word → Input text → select the text box rotation → close the master view.
