Used to define the outside of the section shape.

1. Select either

   Edit > Draw External Contour

   or

   the External Contour tool

2. Click any point in the View window as the first vertex of the exterior of the shape. A line is rubber-banded between this point and the mouse pointer.
3. Click subsequent points to form additional vertices.
   Tip: You may right-click to undo a previous vertex.
4. Double click the final point once you have formed a closed geometric shape. The final point does not need to be a previously entered data point. The rubber band to the first point will give you a preview of what the shape will look like for any point in the View window. The shape is shaded solid.
5. Exit the external contour drawing mode by either

   repeating step one

   or

   select some other drawing mode