An in-depth level that involves:
Line editing for proofing, grammar, spelling; Re-organization of the script in consultation with the author.
Editorial comments on the margin on the script show scenes, or actions that can be revised, transitions and fact checking.
It includes a written report on: plotting, pacing, characterization, the general prospective outcome of the book and most importantly suggestions on new approaches and ideas.
If you find the comments helpful, you can make revisions and improvements after which the editor proofs to ensure it’s ready for publication.