How to do a Boolean subtraction in TransMagic, to create a reversed negative?

In mold making, among other domains, you may need to convert from a part to the mold geometry. This is done in TransMagic using the Split/Trim function:

  •  Import a Cube in the correct location in your CAD system 
  • Open the Cube into TM
  • Import the Part into the same view as the Cube
  • Select the Part solid geometry and right click ans say use as Split/Trim Geometry
  • Select the Cube and say Change/Split.