I've been using Thunderbird as my e-mail program for several years now with great satisfaction.
A couple of days ago, when I opened it to look at my e-mail, the display had everything on the page in 7-8 point size type instead of my usual 10-12 point size font. (Not sure exactly which, so I'm using a range to give you a good idea of what's hapening.)
I don't think I hit a couple of keys simultaneously to cause this to happen, if that's even possible. I have gone into the Tools, Edit, and View editing options and can't seem to find anything to change the font size back to what I want.
This seems like an amazingly simple problem, and I'm not a beginning computer user, but I'm stumped.
What am I missing?