Hi Mten, you can find the option for Steps in the brushes palette (it's often "docked" in the upper right of the Option Bar).

Click the small triangle (arrow) to drop-down the palette
Select Other Dynamics (make sure to actually "click" ON the words and not just the "checkbox")
Select Fade from the "Flow Jitter" control drop-down menu
Enter the value you want for the steps.

hope this is what you're looking for...

:)
retrocity