Some off-deadline section fronts are fully paginated in QuarkXpress. Selected candidates take a four-hour comprehensive editing test. If they pass, they come in for an interview. If they pass the interview, they work a three-night tryout. Most who come in for tryout are hired.
Training is given on an as-needed basis.
I have seen a few copy editors on each desk receive special organized training. There is documentation for most jobs on the computer though it is sorely inadequate. Terrible, either 5 a.m. to 1 p.m. or 10 p.m. to 5 a.m. 17. San Francisco is a wonderful place to live. The strike at the Examiner a year ago has left deep scars.