你的理解有问题。
If vertical mode is set to any value other than .TextBase, then the text object's alignment point is used to determine the text's position. The position point is recalculated based on the text string and the alignment point's value. If vertical mode is .TextBase, then the position point is used to determine the text's position. The alignment point is recalculated based on the text string and the position point's value.