The Sketcher Poly-line tools enable the use of multiple lines constrained with the coincident constraint. If you are designing a complex polygonal shape with many lines and a contiguous area this is a useful tool.
To use the tool begin by selecting the tool in the menu.
Each point of the Polyline is made by a single click.
The current polyline can be ended by pressing escape, or by clicking the right mouse ( depending on your navigation mode. )