The Soft Modification Tool is a deformer with variable falloff attributes that lets you push or pull 3D geometry much like a sculptor would push or pull on a piece of modeling clay to change its form. Color feedback lets you see the area of influence of the deformer on the component or surface.
By default, the amount of deformation is greatest at the center of the push/pull, and gradually falls off further away from the center. You can control the falloff of the deformation to create various deformation effects.
To deform objects or components with Soft Modification
When Color Feedback is turned on you can view the area of influence of the Soft Modification deformer.