General Ivan wrote: options > other, there should be a "Pop-up Scale" which you can use to increase or decrease the fonts.
That can be useful. I have had the popup scale at around 8 - slightly less - which I think enabled me to be a bit faster with the mouse. But I think it doesn't affect the chat box size, which has been a problem for me. Sometimes it's just horrible trying to read that tiny blurry font and many different characters look identical. The blue and the red alliance (=darker) text are the worst. (I play 1600*900 windowed)