Copy Editing, Indexing, Proofreading – What’s the Difference?

People often confuse the functions of copy editing and proofreading, as well as indexing, therefore the purpose of this post is to provide clarification and is laid out in the optimal order in which the tasks should be accomplished.

Copy Editing includes a review and suggestions for improvement of the formatting, style, and accuracy of a manuscript. This includes correction of spelling, punctuation, grammar, mathematics, terminology and jargon, timelines, and semantics; ensuring that the typescript adheres to the publisher’s house style; and addition of headlines and standardized headers, footers, etc. The goal of copy editing is to ensure that the manuscript or article is clear, correct, concise, consistent and comprehensible (by the target audience).

Copy Editing should be done before indexing and proofreading because the result may cause a shift in page numbering, as well as re-written text.

Indexing includes a thorough reading and analysis of the text, identifying indexable concepts and ideas that the text alludes to but doesn’t name specifically, and creation of index headings and locators. Indexes are intended to help the reader, researcher, or information professional, rather than the author, find information, therefore professional indexers act as a liaison between the text and its ultimate user.

Proofreading (also known as line editing) includes the review of text for typographical and formatting errors, and style consistency issues.
Someone not trained in proofreading may not see errors such as missing words or improper usage because it is in the nature of the mind to correct errors automatically.

Proofreading should be done last because there is a possibility that the index could contain errors.