I didn't switch paper so much as have a lightbulb moment. XD
The paper I use is sized for manga, and it has 'live area' and 'bleed area' and 'border' marked in non-photo blue, which is used to tell the artist which areas will definitely be shown, which will probably be shown, and which might be shown but not on purpose. Text should be confined to the live area - inside the dotted line, while stuff in the bleed area will probably be shown, and goes to the very edge of the page. There's a little bit of a border area, but that's just insurance and I don't include it in the post.
Light blue doesn't photocopy well, and there's a specific shade that photocopies so poorly in black and white that they actually call it non-photo blue. This means it's super easy to remove when printing. However, since I scan the pages instead of photocopying them, the blue is still visible.
For the first while, I was only using the live area, the centermost one. Then I figured out that the bleed area can also be used, just don't put anything there like text, because the variance to where the printed page extends should be somewhere along the edges of the bleed. If you look at a manga volume, you'll see that the images tend to splash all over the place and typically go to the very edge of the page. That's what I figured out how to do, and it also gives me a larger area to work in. *g*