This effect can also be applied to other shapes, which can be incredibly useful in altering shapes you created with the pencil tool or preset shape tools.
In this example, the pencil tool is used before the end of the original line. This will reshape the line into the direction of wherever you began drawing you line. You can also begin drawing along any other point of the line and do this. Make sure the first line you drew is selected with the direct selection tool and then begin to draw along the end of the original line with the pencil tool to extend it into a new direction. If you draw a line and would like to extend it or alter it, you can join a new line to it. Alter it in the stroke panel while your path is selected to get a thicker or thinner line. If you do not see any lines after unclicking when you are finished drawing, the stroke may be set to zero. Select it from the tools dialog box and click and drag to draw. The pencil tool is a great tool for creating freeform shapes and lines in Adobe Illustrator.
