Apple Motion 4 - Manual (Page 413)

Where Parameter Behaviors Appear
Like other behaviors, Parameter behaviors appear nested underneath the objects to which
they’re applied in the Layers tab and the Timeline, along with any other behaviors that
have been applied to that object.
Note: Although a Parameter behaviors appear nested under objects in the Layers tab,
keep in mind that each Parameter behavior is applied to a single parameter of an object,
and not the object itself.
Notice that the Parameter behavior icon includes an image similar to a funnel. The funnel
represents the “channeling” of individual parameters.
Parameter behavior
Parameter behavior
413 Chapter 9 Using Behaviors