Hey Jay,
Here's how I understand your scenario: you'd like to have, for instance, 12 point type in your editor window, and be able to zoom in to that window. However, while the fonts look bigger on the screen, they are still 12 point for printing purposes, etc.
Is that right?
Unfortunately, we only do font zooming. Maybe you could add just a little code to the example above, so that you can save and restore your print font size with the flick of a hot key.
As far as font zooming in SE 10.0, wfont_zoom is in there, and that's what you want.
Hopefully that helps!