Thanks. I had tried that. I set the font size to large, but nothing changed in the panels. And it isn't just the panels. The Preferences box that you attached above, and all other menus like that, are so small that I can barely read them. I tried changing the font size again in Preferences, but still no change. Any other suggestions?
Reduce the resolution of your monitor. I have a 22 inch monitor, and the resolution set to 1920 x 1080 pixels, and everything is just about right. Your monitor is a little bit larger, but I would suggest trying the same settings and see if that makes the difference that you need.