If the preferences are turned off as shown in the attached image, you can put the record numbers separated by semi-colons in curly brackets in the document (not the search bar), and endnote will resolve them.
I will caution you, that the Endnote record numbers can be changed by Endnote if your library is uploaded into the cloud and then downloaded to another machine. I have taken to using the accession number field (which comes from pubmed) in my temporary citations settings (also in preference) - or do a change/move/copy (tools in ENX9 and earlier, references menu in EN20 I think) to move your records numbers into the label field and use that. I do this somewhat regularly after sorting on the label field, so I can select the empty records and do the copy rec number to the new field. I also use that tool to preceed it with my initials and then again to add an X to the end to make them unique. I am sure you have noticed that if you “search” for a record number and don’t change it to “IS” the contains brings back any record with a two digit number.
