Well, you see it wrong. :-) As well as NP++ and TotalCommander. :-) If you have 1000 lines on both, the assumption should be to try to match line by line. Specially if the first 13 characters for both sides are the same

Patrick C, since you started it, @Yutaka, I love your tool, the best ever. But, the comparison in two different windows or screens, it’s a bit tough. Sometimes you forget and then, you end up losing one side. Anyway, I do like Notepad++ way of doing it in one screen. Also, since we are talking about comparison, it would be great to be able to push the comparison to HTML. That way, you can save it and pass the report to other folks. Anyway, thanks for this wonderful tool.