Mark each item and "add to the bag". Then "view the bag" and export the items selecting "Endnote/RefWork" saving them to a "Local Disk" which will produce an "export.txt" file.
To import the export.txt, select File→Import→File from the top menu.
From the Import window, select the import file and set the Import Option, Duplicates and Text Translation Options to "EndNote Import", "Import All" and "No Translation", respectively.
Then click on the Import button.