Attached image is ONE DForm object on a flat plane.

Go back to Daz and download their PDF instructions for DazStudio.  It's been updated to include the D-Form instructions towards the back 3/4 of it. 

Rough Instructions
1.  Select item to D-Form

2. D-Form icon on top buttons, or View>Tabs>DForm
       You now have the field, base w/DForm handle attached listed in your Scene tab
   3.. Your tools are in the DForm tab.
   4.  Find "edit spline" to change vertex falloffs to be effected by the Field

I just like the DForm functions better that Poser Magnets.  The live-view of colored verteci are more in line with modelling software (like 3D Max's "soft selection" use)  The spline use for the field is different than I've seen in any program...  but there is a maximum amount of points per spline, and you cannot edit the tangents on the curve.  (rats..but it's still a great tool)