Use Toggle Smooth to toggle to Blocky mode to look for over-lapping edges and other modeling problems which may not be visible in Smooth mode.
- On the ribbon, click 3d Model tab
Freeform panel Toggle Smooth 
. If necessary, click the drop-down menu to access Toggle Smooth. - The freeform body is toggled.
- Blocky mode displays the shape using the control points of the freeform body.
- Smooth mode displays the rounded shape of the freeform body.