Create forms to explore a building concept with extrusions, sweeps, and lofts.
Forms are created by drawing lines and closed loops, selecting them, and clicking 
(Create Form). Use this tool to develop any surface, 3D solid, or void form, and then directly manipulate it using the 3D form manipulation controls.
- Lines
- Reference lines
- Line by points
- Imported lines
- Edges of other form
- Lines or edges from loaded families
The following line types can be used to make a form: