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 frame, 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 frame, 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 frame in processing, can get the correct graphic, rectangular frame, missing, if you want to see in the form of rectangular box can be left click on