Copy-editing in the author’s manuscript means:
(Butcher, Drake and Leach, Butcher’s Copy-editing: the Cambridge Handbook,
4th ed., 2006)
Proofreading in publishers’ typeset proofs means:
(E.L. Dellow, A First Course in Proof Correcting, 1979)
Book indexing from publishers’ page proofs means:
(BS 3700, British Standard Recommendations for Preparing Indexes to Books, Periodicals and Other Documents)
I use the professional indexing program Cindex.