Comprehensive guide, with editing plan
https://www.bangor.ac.uk/studyskills/study-guides/editing.php.en
(Bangor University)
Why edit? With editing tips
https://library.leeds.ac.uk/info/14011/writing/111/revising_editing_and_proofreading
(University of Leeds)
Steps for revising and editing
https://advice.writing.utoronto.ca/revising/revising-and-editing/
(University of Toronto)