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The PLine command can draw curved segments as well as straight ones. If you want a combination of separate linear and curved segments, you must switch between the Line and Arc commands. (I cover arcs in ssss1.) Using the PLine command, though, you can switch between linear or circular-curve segments in a single polyline.
A polyline can have width. Polyline segment width is visually similar to the lineweight object property in AutoCAD (which I discuss in ssss1) except that polyline width can vary from segment to segment, and individual segments can be tapered. Polylines are often used for the copper conductors on electronic printed circuit boards.
Polylines can be smooth curves. After drawing a polyline, you can use the PEdit command to automatically reshape the polyline into a smooth, flowing curve based on the vertex points you selected. I touch on this topic in ssss1.
The following sections show you how to create a line and a polyline.
Toeing the line
Unlike many AutoCAD drawing commands, Line offers limited options. It has a Close option only to create one more segment back to the first point you picked in the current run of the command, and it has an Undo option to remove the most recently drawn segment. You can repeat the Undo option back to the start of the current run of the command.