Can someone tell me how I changed the look of my font in the Fluther answer window?

I usually type looking at the keys, and sometimes, I get in a hurry, and look up at the screen to see what I am typing. I went for the Shift button to make a capital letter, my fingers hit an odd combination of keys, like two at a time, (I have no idea which two as my hand was blocking my view) and it changed the look of my font when I type answers. The letters seem all squished together, and thinner. I’m not sure what I did, but I checked it against my wife’s computer, and the font has definitely been altered. Does anyone have any idea of just what the Hell I did, and know of a way to fix it?