there is a package sys.dbms_space_admin .tablespace_migrate_to_local('USERS') that we can use to move from dictionary to local tablespaces. Will it also remove the HWM when you use this package, I know if you build a new local tablespaces and rebuild the objects, it will remove the HWM and I am not sure about this package. also will it help to reduce the spaces?

Please advise.