Creating effective style sheets outlines the purpose and importance of style sheets. A style sheet is a list created by copy editors that records style decisions made during editing that are not covered by the general house style guide. This ensures consistency and provides guidance for proofreaders. Style sheets are needed by everyone involved in the publishing process, and should be referred to as early as possible. An effective style sheet includes guidelines on spelling, punctuation, numbers, abbreviations, formatting and any other style elements particular to the document. It helps maintain adherence to house style and ensures all editors, proofreaders and authors are following the same style conventions.