OS X comes with a large number of different fonts included, and if you also install third-party software such as Microsoft Office, your system should be full of fonts. Now, this isn’t really much of a problem I mean – come on. What harm is it to have a large number of different fonts to choose from? The only issue is that if you want to see what a font looks like before using it, you will have to slowly go through a large list which can become impractical.

Luckily for you, Apple also cared to include several options in OS X for previewing fonts which can really help you streamline this process. More details follow:

Full article here:
4 Ways to Preview Fonts in OS X (Make Tech Easier)
Related:
Take Control of Your Fonts in OS X (tuts+)
How to Manage Fonts Within Mac Apps the Quick and Easy Way (The Mac Observer)