A lightweight polyline is a parametric entity that specifies a planar figure compounded from straight and circular segments of different widths passed through vertices and connected in a single curve.

For more details, see the following topics:

Overview of Lightweight Polylines

Specific Lightweight Polyline Properties

Computed Lightweight Polyline Properties

Editing Lightweight Polyline Vertices

Editing Lightweight Polyline Segments

Example of Working with the Lightweight Polyline Object