cad绘图知识和技巧

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1、cad绘图知识和技巧　　学习cad绘图一定要先知道一些知识和技巧，那么大家知道cad绘图知识和技巧吗?下面是学习啦小编整理的cad绘图知识和技巧，希望能帮到大家!　　cad绘图知识和技巧：基础　　1.设备绘图界限一般来说，如果用户不作任何设置，系统对作图范围没有限制，可以将绘图区看作是一幅无穷大的图纸。格式-图形界线命令：limits出现四个选项：开、关、指定左下角点、指定右下角点。　　2.设备绘图单位格式-单位命令：ddunits长度、角度、插入比例、方向　　3.对象选择三种方式选择：①直接选择②窗口选择(左选)③交叉选择(右选)

2、。当对象处于选择状态时，在其上会出现若干个带颜色的小方框，称为夹点。工具-选项-选择集未选中：兰色选中：红色暂停：绿色夹点大小可调整。　　4.快速缩放平移视图命令：zoom①全部缩放②范围缩放③比例缩放④窗口缩放⑤实时缩放标准工具栏中的“实时平移”按钮视图-缩放-范围　　5.设备捕捉和栅格①捕捉organizationsystemandworkingmode,theselectionofanumberofmunicipalstrengtheninggrouptobuildinnovationandstrengthentheorgan

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