Sometimes when looking at a code review making comments against individual lines is not appropriate. The implementer might have got the design/architecture or pattern wrong. It would help to be able to record a comment at a top level against the review to allow an audit trail without having to go through all the line by line comments. For example. Design and implementation ok, no security has been considered and there are weaknesses so needs rework. Minor code comments as recorded, but review abandoned due to high level issues.