What does a proofreader do?

A proofreader checks a completed book or publication before it gets sent to the printers. They typically work with galley copies, which have already been typeset by the printer. As a proofreader, your responsibilities are to find any grammatical errors, proofreading mistakes, or typographical inconsistencies in the text and mark them with specialized symbols that indicate the appropriate changes for the printer to make. You might work from digital texts, so you need to have good computer literacy and familiarity with digital publication software and standard editing marks.