It is up to the Journal Manager on how to manage the editorial team. A person who has technical and editorial skills could manage the entire lifecycle of the journal; or the roles can be divided among team members. When developing your operational approach to journal management, consider which team members have:
-editorial control (final say)
-editorial policies (copyright, permissions, scope, author guidelines, blind review guidlines, etc)
-editorial support (copy-editing, layout editing, peer reviewing
-technical skills (web layout, layout-editing)
Thinking about these roles will you build your team within the OJS software. The OJS internal workflow was designed around the "role" of the journal memebers. Please note, it is possible for one member to have multiple roles. For example, a Section Editor can also be a Copy-Editor; or a Peer-Reviewer can also be a Lay-out Editor; or a Journal Manager can be the manager, the Copy-Editor and Layout-Editor.
If you didn't review the OJS tutorials mentioned in the "Journal Setup" tab, it may be helpful to review the modules with the tutorials below for the different roles. (Either for an overall knowledge of the OJS software; or to learn more about your specific role).