Subtracting 3D Solids or Regions
The Subtract command creates a composite region or a 3D solid by subtraction.
To subtract regions or 3D solids from each other:
- Click Solids > Solid Editing > Subtract (or type Subtract).
- Select the regions or 3D solids to subtract from.
- Select the regions or 3D solids to subtract and press Enter.
- From the objects in the first selection all objects in second selection are subtracted. The original objects are deleted.

Note: If a selection set contains more than one object, the union operation is applied to it first:
Vresult = (V1[Set1] + V2[Set1] + .. + Vi[Set1]) - (V1[Set2] + V2[Set2] + .. + Vj[Set2])
Command: Subtract
Menu: Solids > Solid Editing > Subtract