Blue pencilers are individuals who edit, revise, or censor written materials. Synonyms for this term can vary depending on the context and purpose of the editing. Some common synonyms for blue pencilers include proofreaders, copy editors, revisers, editors, censors, and redactors. A proofreader focuses on checking the accuracy of grammar, spelling, and punctuation. A copy editor goes beyond proofreading and checks the style, tone, and coherence of a written piece. Revisers typically make major changes to a text to enhance its quality. An editor may perform all these tasks and more. A censor or redactor is responsible for removing inappropriate content from a text. These different types of blue pencilers share the common goal of improving written works.