To delete references:
Select (highlight) those references you want to delete.
Do one of these, which moves the selected references to the Trash group:
Drag the selected references and drop them on the Trash group.
From the References menu, select Move References to Trash.
From the Edit menu, select Cut, which also stores the references temporarily on the Clipboard.
From the Edit menu, select Clear.
When you are absolutely certain that you want to delete the references in the Trash, go to the References menu and select Empty Trash.
You must confirm that you want to remove the references from the library.
Note: You cannot undo the Empty Trash command, so be sure you want to delete the reference(s) in Trash before dismissing the EndNote warning.
Display All References again to continue working in your library.
The Trash group contains references you have removed from the library by using any of the methods mentioned above. While the references are officially no longer in your library (they will not appear in any other group or reference list, they are not included in your reference count, and they cannot be searched or cited), they are not completely deleted until you go to the References menu and select Empty Trash.
Until you select Empty Trash, you can still drag references from the Trash group back to the All References group of your active library. Or, highlight a reference in the Trash group, right-click the reference, and select Restore to Library.
If you do not actively select the Empty Trash command, you will be prompted when you close the EndNote library.
Note: When you delete a reference, you delete its record number in that library forever. Even if you paste the reference back into the same library, it is assigned a new, unique record number. This may cause incompatibilities with older papers that have citations that use old record numbers. We strongly recommend that you do not delete references that have been used in papers that you might want to reformat later, and keep backups of your libraries!