1.
Click Shape in the main tool palette.
2. Click Spline in the lower tool palette.
3. Click in any window to enter drawing mode and start drawing. The
first click defines the position of the first vertex. Each subsequent
click will define the next vertex in line.
4. Double click to add the last vertex and exit drawing mode, or click
on the first vertex to close the shape and exit drawing mode.
5. Use Window > Object Info to name
the object. Naming objects now makes them easier to select from the
command line. This is nice when dealing with a large scene.