As an entry-level proofreader, your primary duties include making sure a piece of writing follows the correct style guide and proofreading for errors in spelling, punctuation, and grammar. You read the written copy and make sure that the writer makes all necessary editorial changes. Your responsibilities involve working on new copy and going back to ensure that existing material meets new editorial standards as they roll out. You look at the layout of the work as well to ensure they used the right paragraph size, margins, spacing, and image layout. Your employer may also give you a role in copyediting, which involves editing for content and flow.