In workflows add when "Create OR Field Update"

In workflows add when "Create OR Field Update"

Actually in workflows you can pick WHEN Create, Create or Edit, Edit, Field Update or Delete. What about "Create or Field Update"?

Must workflows using WHEN = "Field Update" have to be Duplicate to run WHEN = Create. You can use "Create or Edit" and it will run when other fields are edited. It has to be WHEN "Field Update" AND WHEN "Create", so, what about to add "Create or Field Update"?