说明：  cam350 7.0等版本在导入gerber后，笔记本电脑中没有+、- 键往往很痛苦于图面的放大、缩小，特开发了放大、缩小的宏指令，可以在软件中macro中指定hotkey，如F11为缩小，F12为放大。如此可以很方便啦。很好用哦
(cam350 7.0 and other versions after importing gerber, no laptop+ and- keys are often very painful enlarged drawing in and out, especially the development of the zoom in, zoom out macro, you can specify hotkey macro in the software, such as the F11 is zoomout, F12 to zoomin. So it can be very convenient)