If you ever get lost, or can't see the attractor, try pressing resetView and/or lowering the contrast. (Contrast is key!)
a, b, c, and d plug in factors into the selected formula.
Try selecting one and then varying a, b, c, or d.
Then adjust the contrast to see interesting detail.
Zoom in to an interesting nexus, or try turning on visualizePath.
Discover a form never before seen, and then tweet it or screencap it to imgur by pressing takeSnapshot.
(Click one of these help boxes or uncheck showHelp to hide them.)