Groups are used to organise references into specific categories or subsets. You can organise references according to theories, authors, or overarching themes, for example.
In addition to the groups automatically generated by EndNote (e.g., All references, Unfiled and Trash), you can create the following groups:
You can also create group sets to further organise your library. They can contain any combination of custom groups, smart groups and combination groups.
To create a group, right-click on My Groups and select the type of group from the drop-down.
EndNote reference management software, Clarivate Analytics, Version 20, 2020.
Drag and drop references from All References into groups. Removing a reference from a group will not remove the reference from your Library.