You find it in your brush pallet (pull down menu on the brush/smudge/eraser tool). Hover your mouse over the brush and it should display the name. One of the brushes is called a "Chalk Brush"
Here it is:

The number below it is the size of the brush. This is adjustable with the slider at top.
This post was edited by SaffasMissionary on Aug 21 2008 02:36pm