Who am I? A "Copy Editor"? I help with typesetting of one scientific journal: I recieve the articles in the form in which they were finally accepted, and I re-format them etc. to make them ready for publication. Currently, my title in the journal colophon says: "Graphic Design and Typesetting: M. Name".

However, I get the impression that this position is in the scientific jargon usually called "Copy Editor", which would suit the colophon quite well since there are other "Editors" listed there (Language, Guest, Editor-in-charge, etc.). I want to make sure whether this is appropriate or not.

So: Who am I?
A copy editor is usually the person who runs through the manuscript checking that it adheres to the style of the journal. this includes checking references, checking figure numbering but also spelling and language, in short almost everything. The copy editor improves the paper from these formal/technical points of view. It is not usually the copy editor that typesets the paper because that is usually done by a typesetter involved with the printer. Having said that, with purely electronic publication it is more likely that this task would also end up with a copy editor. Thus the old demarcation lines between copy editor and printer may be less and less clear. 

The editors usually handle scientific content and managing contacts between reviewers and authors on matters of the scientific content as well as making decisions. The name for this varies a lot between journals.

So who are you? Your current "title" may be OK but if you also improve the formal and technical quality of the paper, copy editor would be most appropriate.