You can adjust the curvature of each individual assignment in the Quick Control Assignments editor.
Procedure
To adjust the curvature, do one of the following:
Select the quick control that you want to edit, and specify a value in the Curvature value field.
Positive values change the curvature towards logarithmic behavior, and negative values change it towards exponential behavior.
Click and drag the curvature in the display on the right.