weblearner99

I am using wordpress for my blog/site. I am using Freshnews theme from woothemes as the theme for the blog. Here is the link: http://demo.woothemes.com/freshnews/ The font is not that good and it is way too small and the spacing is bad (too congested). How do I change the fonts, size, spacing (line and paragraph) throughout the blog. I know I would have to change it somewhere in the stylesheet. But where exactly and how? And what are the ways to get this done? Should I install a font somewhere? Should I use webfonts (like google webfonts)? What is the advantage in using this? or what are the other ways?