运行之后，先在画图框中选“画矩形”，然后在窗口中拖一个矩形出来，从左上角到右下角，然后矩形就画完了；

在画图框中选“画多边形”，然后在窗口范围内点多边形的顶点，点完了点以后，右击，在弹出的菜单中选“闭合”，就可以生成多边形；

在处理框中选“开窗”，就可以得到正确的图形了，此时，矩形框不见了，如果要看矩形框，在窗体上左击就可以了-After the operation, the first in drawing fr a me, select "painting and rectangular window of a rectangular out from the upper left corner, and then to the rectangular is finished,

Select "painting in drawing fr a me, then in the window polygon within the scope of the polygon, points out some vertices, right-click on the popup menu, select the" logratios ", can generate polygon,

Select "window fr a me in processing, can get the correct graphic, rectangular fr a me, missing, if you want to see in the form of rectangular box can be left click on