Amir Sattarian sent us a unique routine to automatically place dimensions in AutoCAD. At first I had a little trouble figuring out how this routine works, but now I see how it can be very useful. Start by loading the LISP file. The command name is DD, but don’t run it just yet. This command works by asking you to pick two points; think of it as if you were specifying a fence to select objects. Any supported entity that is crossed by your "fence" will be dimensioned. If you cross five lines, you’ll get four dimensions. The dimension is created at the point the fence touches the entity, so it seems most logical for parallel entities. I suspect a few of you will figure out some other uses, though.