I wanna change my font family but i was not able to find the configuration file for it. In the following is what I would like to do. Does anyone know how to change fonts? Thanks in advance.
Application/Document/Desktop font: Liberation Sans, size 8
Window title font: Liberation Sans Bold, size 10
Fixed with font: Liberation Mono, 10
Font rendering: Best contrast (the others left weird artifacts, but mostly up to taste here I think)
Under details:
Resolution: 99 dpi (to avoid the letters to get too close, need at least 1 px between them

Smoothing: Grayscale
Hinting: Full
Reference : http://blog.xam.dk/