On-screen fonts appear tiny on OpenBSD 5.5

I chose the default installation of OpenBSD 5.5. My monitor's brand is Samsung 27-inch 850 series LED. It's in full high-definition, 1920x1080. After I type my login username and password, I am presented with a window and whatever I type into it appears tiny, that is, the on-screen fonts are too small for me to read. How do I make the on-screen fonts and icons on the desktop larger for me to see clearly? (I believe the default window manager is FVWM)