Format - Area , and then click the Shadows tab. If you click this icon when no object is selected, the shadow is added to the next object that you draw.
为选定的对象添加阴影。如果对象已经具有阴影，则会删除阴影。如果在没有选择对象的情况下单击此图标，则会为绘制的下一个对象添加阴影。