(see also: Shape Tools Overview)
The Starburst tool is for making stars or starbursts with any number of points. You can also bend the star spikes for unique effects.
The Inner Radius defines the distance between the center and the interior points of the starburst.
The Outer Radius defines the distance between the center and the very tip of each spike.
The Number of Spikes determines how many spikes there are in the star. Each spike is distributed evenly around the star.
The Spike Twist distorts the spikes to rotate around the center of the starburst.