CST MWS set edge是哪个菜单啊

如果是设置边缘距离的话。主要是在solve--background material  和solve--boundary condtions中设置。工具栏中也有快捷图标。

set edge?要是现实什么功能?

这个对应的是Pick棱边命令。解释如下：
Pick.AddEdge ( int u1, int v1, int w1, int u2, int v2, int w2 )
Defines an edge with the starting point (u1,v1,w1) and the end point (u2,v2,w2). The points are taken as coordinates in the actual working coordinate system (WCS).