Editing Proofreading (section)

===Traditional method===
[[File:Historical sketch of Posey County, Indiana - DPLA - 195d919570db0bda5f26f016757a9014 (page 14).jpg|thumb|A galley proof]]
A "galley proof" (familiarly, "a proof") is a [[Typesetting|typeset]] version of [[Copy (publishing)|copy]] or a [[Manuscript (publishing)|manuscript]] [[document]]. It may contain [[typographical error]]s ("printer's errors"), as a result of human error during typesetting. Traditionally, a proofreader looks at a portion of text on the copy, compares it to the corresponding typeset portion, and then marks any errors (sometimes called "line edits") using [[List of proofreader's marks|standard proofreaders' marks]].<ref>{{Cite web |url=http://www.merriam-webster.com/mw/table/proofrea.htm |title=Proofreaders' Marks |access-date=2009-06-16 |archive-date=2010-08-16 |archive-url=https://web.archive.org/web/20100816210104/http://www.merriam-webster.com/mw/table/proofrea.htm |url-status=dead }} from [[Merriam Webster]]</ref>

Unlike [[copy editing]], the defining procedure of a proofreading service is to work directly with two sets of information at the same time. Proofs are then returned to the typesetter for correction. Correction-cycle proofs will typically have one descriptive term, such as "bounce", "bump", or "revise" unique to the department or organization and used for clarity to the strict exclusion of any other.{{cn|date=April 2025}}