Mathematica Tutorial: Visualization And Graphics - Wolfram Research

122 Visualization and Graphics
You can set line styles with the Graphics Inspector palette.
Draw Line Segments Tool
Click the Draw Line Segments tool and drag the pointer (
) to draw a multi-segment
line.
You get a new segment after each click.
To stop, double-click the last point or single-click the first point.
You can set the line style with the Graphics Inspector palette.