The first thing to make sure you do is to print to OneNote the same way you would want those pages printed on a printer. You can always zoom in to make things bigger. If you won’t ever need a hardcopy with your notes, don’t worry about this, but OneNote will try to group pages to fit all of one image in a page (keyword: try). If you have two PowerPoint slides to an image already, you won’t have to work with OneNote to make it print two images per page (because OneNote will likely just print one slide per page).