1. in the control center, under system admin. you will find mepis utilities. you may change the resolution there, as well as the general size of the fonts.
2.The font size can also be adjusted under appearance and themes in the control center.
3. I used the nvidia installer that can be found at
www.nvidia.com. Worked well. Remember to install the xorg.dev package or you will have trouble.
I just installed the nvidia driver on two of my distros, Mepis being one of them look in my recent posts for more usefull help on the subject.