The proofreader's marks are handy ways of communicating changes you want someone to make in a manuscript. When everyone knows the marks, the system is very efficient. However, if your client does not know the marks, don't use them. Ask the writer to submit a draft that is double-spaced so you can write between the lines or in the margins.
You should know how to use all of the proofreader's marks so you can use them adeptly when the client also knows the marks. This lesson requires you to learn all of the marks.
When you are ready to demonstrate your competence, e-mail Dr. Hogan explaining how well you did on the assignment below.