ERwin Manual final
https://www.kaia.re.kr/portal/cmm/fms/FileDown.do?atchFileId=FILE_000000000018193&fileSn=1

ERwin 사이트 가이드
https://bookshelf.erwin.com/bookshelf/public_html/2020R2/Content/User%20Guides/erwin%20Help/erwin%20Data%20Modeler%20User%20Interface.html