The displacement tendency for each lattice site is indicated by arrow line.

界面层上格点位移的方向由以该格点为始点的带箭头线段示出.

Direction; Direction menu item shows a compass and Kaba Sharif direction by an arrow line from the center of compass.

方向；方向菜单项显示一个罗盘和卡巴谢里夫方向的箭头线的中心指南针。