What I do not do
I will not format your paper according to the requirements of a particular journal; these requirements vary from journal to journal, I don't have the time or interest to learn them all, and you will need to carefully review these requirements before you submit your paper to a particular journal. I will not edit figures or tables but will edit figure legends and table titles. I will not check literature cited content or format.
Although I will edit and revise most of your document (or whatever parts we agree on), there may be paragraphs that I simply cannot revise because I do not understand them. When this happens, I will explain why I don't understand, and I will try to ask useful questions or suggest useful changes. If such paragraphs make up a substantial portion of the paper, I may tell you at the start that I am unable to edit the current version.