主要功能为各种图元的绘制，如点，线，面，五角星，多边形等，提供图元的放大缩小，移动等编辑功能。-main functions of the various plans drawn yuan, such as point, line, surface, the five-pointed star, polygons, yuan plans for the zooming, mobile and other editing features

主要功能为各种图元的绘制，如点，线，面，五角星，多边形等，提供图元的放大缩小，移动等编辑功能。-main functions of the various plans drawn yuan, such as point, line, surface, the five-pointed star, polygons, yuan plans for the zooming, mobile and other editing features