Hey guys, is there any way to zoom text, thumbnails, etc. using this combination? I'm so used to this in office, chrome and other apps that I'd love this in OPUS!!
No way at the moment, as far as I know. If you want it, request it.
I think it would make sense in thumbnails mode (currently you can add a thumbnail size slider which appears while in thumbnails mode and lets you override the size set in Preferences; makes sense for Ctrl-Wheel to do the same as the slider) and maybe tiles mode. Not sure I see the use in other modes.
Well, sometimes if you are an old fart like me you need to zoom text to see it properly 
Why would you want to keep changing the font size between one you can read and one you can't, rather than keep it at the size that works for you?
BTW, there is a magnifier built into Windows 7: Push the Windows key and +/- to zoom in/out, and Windows-Esc to close it.