It is found that a manuscript can be assigned by an Editor to : Section Editor, Editor OR Self. Of these, what is the difference between Assigning to a Section Editor and an Editor?
(Summarry ---->Submission ----> Editors----> Add Section Editor| Add Editor| Add Self)
These are convenience options to show the list of Editors and the list of Section Editors for assignment.
The difference in the lists is based on the assignment of the different roles. For details on the difference in the roles, OJS in an Hour might be a good place to start.