主要功能1：按数字1—255是修改CAD线颜色，2：按数字01-045是改变线图层，改变图层插件内图层对应CAD图层管理器内图层-Main functions: 1 according to the number 1-255 is to modify CAD line color, 2: according to the digital 01-045 is to change the chart layer, change layer within the plug-in layer corresponding CAD layer in the layer manager