I edit MS Word documents using track changes, PDF files using Adobe's highlight/note function, and hard copy using the old-fashioned red pen. If you hire me, you'll get a detail- and deadline-oriented editor and proofreader who is easy to work with.
Depending on my schedule and on the length of the book, I can return a copy edit or proofread within a week or two. Books that need a heavier edit may take longer. For jobs over $400 I prefer half up front with the balance due upon project completion.