Trelis 16.5 User Documentation
The subtract operation subtracts one body or set of bodies from another body or set of bodies. The order of subtraction is significant - the body or bodies specified before the From keyword is/are subtracted from bodies specified after From. The new body retains the original body's id. If any additional bodies are created, they will be given the next highest available ids. The keep option simply retains all of the original bodies. The command is:
Subtract [Volume|BODY] <range> From [Volume|BODY] <range> [Imprint] [Keep]
The imprint option imprints the subtracted bodies onto the resultant body.