Substantive edit (listed above) plus:
Initially edit one chapter for author approval before proceeding to entire manuscript; reorganize sentences, paragraphs, and chapters for logical flow; smooth transitions between sentences, paragraphs, and chapters; rewrite unclear text; ensure consistent structure by adding and deleting headings and subheadings; check for overall clarity and accuracy; enforce consistent style and tone; revise all aspects of the text to improve its presentation.
Plus – proofreading.
Line by line reading and printout of typeset pages marking:
Typos and misspelled words; incorrect words; inappropriate word, line and page breaks; editorial oversights; incorrect number and alphabetical sequences; incorrect vertical and horizontal alignment of text; formatting problems; extra spaces between words and characters; and transposed punctuation.
We also check:
All front matter for accuracy; running headers and page numbers; table of contents and chapter titles; subheads; format consistency; hyphenation and line breaks, orphans and widow; figures and tables; footnotes and endnotes; and bibliography/resources.