In NX and other cad programs, solid bodies are created by adding, subtracting volumes from created body volume.

None: It is used for creating a body.

- Unite: It is used for adding volume to a solid body.

- Subtract: It is used for subtracting volume from the body.

- Intersect: It is used for creating volume on the intersection of extruded volume and solid body.

- Inferred: It decides which method (none, add, extract, intersect) will use automatically due to drawing.
