New posts in Copy Editing

Minor editorial error during minor revision. Should I notify the editor or just correct it?

Why does a copy editor count the number of characters on a line?

How much am I allowed to edit my ESL friend's Master's Thesis?

Is copy-editing/typesetting the only step in the publishing process where someone other than the author makes changes to the manuscript?

How to check and correct editorial changes to a manuscript post-acceptance?