Proofreading is the final edit before publication and release. It is highly recommended that manuscripts undergo at least one round of copyedits before entering the proofing stage, as proofs do not cover issues of wordiness, awkward phrases, sentence and paragraph variety, or basic fact-checking. It will, however, give that last bit of polish. Style guides will be updated or created for each new manuscript to ensure consistency.
Errors and inconsistencies in all mechanical matters (spelling, grammar, syntax, punctuation, capitalization, hyphenation, format of lists, abbreviations, etc.)
Typeface, font, and formatting issues
Consistency (from a style guide, if available)
Bibliographies and reference lists (if included)