Gain experience in writing and grammar.
Complete a degree with an English major or take professional writing courses, including copy editing and online editing.
Learn standard proofreading and editing marks.
Proofreading and editing marks are tools to improve documents and serve as a checkpoint to relay the information back to the printer or typesetter. Some guidebooks that teach these marks include “The Chicago Manual of Style,” “The Gregg Reference Manual”, and “The Associated Press Stylebook.” Professionals regularly use these reference guides.
Enrol in a proofreading class.
Take a proofreading course in person or online that conforms to the busy schedule.