Nonlinear Deformer Attributes
Select one of the following options.
Specifies how the amplitude decays. Negative values specify a decay towards the center of the deformer handle (minimum is -1.000), and positive values specify a decay away from the center of the deformer handle (maximum is 1.000). Use the slider to select values from -1.000 and 1.000. Default is 0.000 (no decay).