This document provides information about copyreading, including what copyreaders do, the essential qualities and duties of a copyreader, and exercises for identifying errors in form and content. A copyreader edits written work for publication by comprehensively revising articles and correcting errors in grammar, spelling, punctuation, facts, style, and structure using copyediting marks based on publication standards. Their duties include improving news value, deleting unnecessary information, and ensuring content is not libelous, seditious, or contrary to laws/taste.