Side note: OneNote sometimes does some funky stuff when printing a page. From my testing, an Arial, 11pt, overline and 123 characters ( follow this exactly, otherwise the line length will not be the same) is the perfect width and creates equal left and right margins when printing a page to A4. custom rule lines using macros) and I think I have found my solution:Ī horizontal line at the top of a container that I use to define the container width. I have tried a tonne of different things (e.g. So, like everyone else, I have wanted pages that have an infinite vertical length but an A4 width so that the page is still printable.