When you add a new operator to the Wire Setup View, all of its controls are displayed in one or more Rollouts within the lower right-hand side of the thinkingParticles dialog window. These Parameter Rollouts contain the various settings that can be used to manipulate your particles.
The Parameter Rollouts behave exactly like other 3ds Max Rollouts. They are context-sensitive menus that change based on the selection of an Operator or other node within the Wire Setup View or DynamicSet Tree View. If this menu seems to be cut off at the bottom of the thinkingParticles dialog window, scroll the menu up/down by using any of the standard mouse scroll options.
This section was fairly simple to grasp in the broad scope that is thinkingParticles. Next you'll be introduced to one of the newest features (and most powerful) within the entire product - the new Rigid Body Dynamics and Simulation system.
While it is highly recommended that you go through the Introduction material in order, if you prefer you can click on any of the topics that interest you.