Mechanical engineer Perry Pattiz shares a tip on joining lines and polylines in AutoCAD.
"A few years ago AutoCAD introduced the Join command, which allows you to select several back-to-back lines in a straight row to combine them into a single line. Quite by accident, I found out that the Join command has been improved in release 2012 to work with lines that are not co-linear. It turns them into a contiguous polyline, with all of the capabilities that the polyline type possesses. You can also use the Join command to join polylines together, avoiding the multiple steps of starting the PEdit command, creating polylines, then selecting them to join together in a single entity."
Notes from Cadalyst Tip Reviewer Brian Benton: Joining lines, and other objects, has become much easier in recent releases of AutoCAD. The software will even join arcs together, or arcs and lines, or arcs and polylines — you get the idea.