To do this you need a browser with an Inspect Element feature, and you need to be comfortable editing the DOM tree/fixing up CSS styles with it. I think the general principle may well apply to other sheets as well.
After a little bit of HTML messing about I've found a way to do a very basic version with the D&D 5e Shaped character sheet. Hi all, Like so many others, I've been bugged by not being able to print character sheets.
