Edit Membership Tool

You can directly edit deformer set memberships by selecting deformable object points with the Set Membership Tool.
Important: The Edit Membership Tool does not work if your Geometry has component tags. The Edit Membership Tool is now a legacy tool and has been replaced by Component Tags which is now the preferred method. Component Tag-defined deformation membership is backwards compatible with deformer set defined membership so you can use both method in the same deformation chain.

See Editing deformer set membership and Paint Set Membership Tool.