This post sums it up pretty well. The gist is that there are 3 levels based on your site usage and you can do more things the higher you go. Level 3 gives you the ability to link things and embed pictures.
This post sums it up pretty well. The gist is that there are 3 levels based on your site usage and you can do more things the higher you go. Level 3 gives you the ability to link things and embed pictures.