+ - default_font_family = sans-serif
+ - monospace_font_family = monospace (example "Aerial Mono" )
+ - cursive_font_family = sans
+ - fantasy_font_family = "Pterra"
+ - serif_font_family = serif (example "DejaVu Serif")
+ - sans_serif_font_family = sans (example "DejaVu Sans")
+