# BOOLEAN OPERATIONS Boolean operations allow for solids to be used as tools to shape and modify other solids. # UNION Union allows solids to be combined to create a new solid. # SUBTRACT Subtract allows one solid to be used as a cutting tool for another sold. Useful for making hole features. Selection A will have selection B removed from it. # INTERSECTION Intersection allows for the creation of a new solid in the space where 2 existing solids overlap.