Intro to Illustrator: Stroke Panel
The Stroke Panel in Illustrator does more than just a simple stroke on a line or shape. You can control the ends of lines with different caps, you can add stroke attributes and also work with stroke alignment to shapes. Every try to make a dotted line in Illustrator? That is where the dashed line function comes in and it is amazingly simple. You can also add head and tail effects to lines and open shapes.