looking at docs/en_us/course_authors/source/Images/pages_editor.png, the text on the first line inside the editor as shown in this image is
"This is where you can add additional pages to your courseware, Click the 'edit' button to begin editing."
Aside from the redundancy of "add additional", and the fact that there doesn't seem to be an 'edit' button anywhere in the image, it confused me that this instruction is shown but not included as one of the steps that you give. I *think* that the problem is that the user has ALREADY clicked an Edit control to get to this Editor, and the text in the Editor (and therefore also in this image) isn't needed.