Take your icon game to the next level. Check out Fonticons, from the maker of Font Awesome.
             

fa-columns · Unicode: f0db · Created: v2.0 · Categories: Text Editor Icons

After you get up and running, you can place Font Awesome icons just about anywhere with the <i> tag:

fa-columns
<i class="fa fa-columns"></i>

Looking for more? Check out the examples.