I'm working on a report, and some elements are outside the margins (but some are just barely outside the margins). I was wondering: Is there a way to make two vertical lines, one on each side, along the margins so that one can easily see if it goes outside them?

(Googling it, I only found information about margin notes.)

A figure is below:

|report text goes here|
|more text goes also h|ere
|and so on and so fort|h

It would certainly make correcting these kinds of mistakes very trivial. :)

Feel free to post answers that would solve/show this problem in a more "LaTeX-correct" way, if that makes any sense at all.