A professional proofreader is the final quality control service in editing.

It is always possible for errors to be introduced accidentally during any of the different editing stages. The design process can also cause layout problems.

So, your proofreader will ensure your text is ‘fit for purpose’ by correcting any remaining errors following the copy-edit. A proofreader will not reword your sentences, reorder blocks of text or do any fact-checking or insert headings, unless they have been specifically briefed to do so. Any additional work of this nature would class as ‘extra paid tasks’. 

A proofreader will mark your work up for typesetting, ensuring your manuscript is ready for publication, or to be submitted to an agent.