数字化图形分层显示，实现基本的选择及操作，以及量测功能-Layered digital graphic shows that the realization of the basic options and operations, as well as the measurement function

一个小型的读图软件，可以实现图形的放大缩小蛮有等一些功能-A small in image software, graphics zoom in quite such as some of the features