The textbook is intended for studying the subject "Basics of editing of official documents" and is part of the training and methodological set for the profession "Secretary." Theoretical material on the main sections of the academic discipline "Fundamentals of Editing" is presented. Common errors that violate language norms are illustrated and analyzed using specific examples. After each chapter, test questions, abstract topics, and practice assignments are offered. For students of primary vocational education institutions studying in the professions "Secretary," "Secretary-referent."