. I am looking for the file, which is dependend, so i can choose more fonts in the ThemeMagic in future. You understand, what i mean?.
add your CSS to wherever you can add custom css, This will vary by template. Look for someplace like
templates/whatever_template_name/css/custom.css
font-family: 'Dosis', sans-serif;
font-family: 'Cutive Mono', serif;
then you can add the font link in the After <head> box under Custom Code
<link href='http://fonts.googleapis.com/css?family=FONTNAME' rel='stylesheet' type='text/css'>
Now when you go into the magic typo menu, enter the name of the font, in my example, either
dosis or
cutive mono then click Preview to see how it looks