What ever the setting on your personal computer that will allow the biggest font setting. For some reason the the less pixels you use the better the picture.
I believe that the first time I ran the progran that they use.(they will check your computer to insure that you meet the minium requirement) they put up a warning message to rest my computer to the lower level to vet the picture better.
hope this helps.
So it's low resolution to get big letters?
And were you using a tube tv, lcd, plasma, or something else?