I, like a lot of people by the sounds of it use Dashboards as more of a way compile my data and display it in a visually pleasing way. As a result, my Dashboards sometimes are more than 1 page long. It would be great to know where the Page Break is i.e. a clear line visible when in Edit mode The current way I am working around this is very cumbersome - I move my widgets around to where I think the page overlaps and then check in File>Print to view the Preview and see that the widget is in the correct place and not across 2 pages. This has to be repeated several times to get it right.
The Page Break Line would display in Edit Dashboard view based on the Layout and Paper Size set in the current File>Print menu. You could also add a checkbox option in the same menu to turn this feature on or off the same as you currently have for Headers and Footers.
If you have any questions or require further info / examples please let me know.