For now, read editor Amanda Moon’s take on the process.
Every editor has a different editorial style – in my case, I like to speak with an author about her vision for the book, discuss concerns. I enjoy being a “hands-on” editor and asking as many questions of the author as possible, finding ways to be more specific when it comes to an idea, more accurate when setting a scene, as assertive as possible when describing why you are the right person to write about your topic of interest, and finally, finding ways to crystallize your hook – the angle and viewpoint that really makes your project stand out in the mountain of proposals going to agents and publishers these days. I also like to line edit. So I offered Monique line edits, and the “macro” level big-think edits as well.