By editing your theme’s stylesheet.
Thanks – do I just change it to anything or is there only specific ones?
It really depends what you want to change and where. I’m sorry but you’re really going to have to provide a lot more detail and probably a site url before anyone can give specific help.
dippyjones,
esmi is right, we need more specifics. Otherwise scan through your style.css file and look for the font names such as Times, Verdana, Lucida, Trebuchet, etc. and change them to something else.
