Linking Unlinking Use linking to build hierarchy of the parent object by creating children When Animating Objects Use links before animating objects the link constraint allows a link at specific frames SOURCE; https://knowledge.autodesk.com/support/3ds-max/learn-explore/caas/CloudHelp/cloudhelp/2017/ENU/3DSMax/files/GUID-4115DE9B-D636-4A42-904E-71259A843E0A-htm.html