Draw Polylines
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A polyline is a connected sequence of segments created as a single object. You can create straight line segments, arc segments, or a combination of the two.

Polylines are ideal for applications including the following:

Polylines can be created with several commands including PLINE, RECTANG, POLYGON, DONUT, BOUNDARY, and REVCLOUD. All of these commands result in a LWPOLYLINE (lightweight polyline) object type.

With the 3DPOLY command, you can create non-planar polylines that result in a POLYLINE object type. Fewer options are available with 3D polylines.

After you create a polyline, you can edit it using grips or PEDIT. You can use EXPLODE to convert polylines to individual line and arc segments.

NoteYou can convert a spline-fit polyline created with PEDIT into a true spline object with SPLINE.

Create Wide Polylines

You can draw polylines of various widths by using the Width and Halfwidth options. You can set the width of individual segments and make them taper gradually from one width to another. These options become available after you specify a starting point for the polyline.

The Width and Halfwidth options set the width of the next polyline segments you draw. Widths greater than zero produce wide lines, which are filled if Fill mode is on and outlined if Fill mode is off.

Intersections of adjacent wide segments are usually beveled. However, nontangent arc segments, acute angles, or segments that use a dash-dot linetype are not beveled.

Create Polylines from the Boundaries of Objects

You can create a polyline from the boundaries of objects that form a closed area with BOUNDARY. A polyline created using this method is a separate object, distinct from the objects used to create it.

To expedite the boundary selection process in large or complex drawings, you can specify a group of boundary candidates, called a boundary set. You create this set by selecting the objects you want to use define the boundary.

See Also
To draw a polyline with straight segments
To draw a line and arc combination polyline
To create a wide polyline
To create a boundary polyline
Quick Reference
System Variables