Rude 13.1

The biggest difference I can see between copyediting and proofreading is that the original copy is set double spaced to make writing editing marks easier and clearer. Because of the lack space for marks in the single spaced body copy of the set text in Figure 13.4, placing marks in the margins is necessary. Also, there will (we hope) fewer corrections that need to be made, so it is possible to write all the necessary corrections in the margins and they can be checked off as they are corrected. Knowing there are three errors on a line (shown by number of margin markings) facilitates correcting all errors.