I'm fond of bringing hard copies of slides during presentations. It allows me to (1) go through the different slides without distracting the audience from the slide on the projector, and (2) scribble notes just so that I don't miss any information during the presentation.
BUT, it can be so annoying when you see pages that have so much white space and small slides in it. Annoying and frustrating. And during one of those frustrating moments, I did a little playing around and came up with tricks of my own to minimize these white spaces.