In EndNote: select Groups > Create Group, name your group.
Select references in your library, Under References > copy
Use EndNote Online or EndNote Sync.
1. Go to endnote.com and register online to access your online account.
2. Log-in: Enter your email address + your password.
Click on Organize: Manage my Groups, Create a new group or enter the title of an EndNote Library.
3. ENDNOTE under EndNote Online - click on Transfer/Sync option, to or from the web groups.
4. You can also IMPORT directly from the databases into your EndNote Online group.