The little faces?

How do you get the little faces?
I can get the Post Icons at the bottom of the page but how do you get the ones that are in your post?
like this one :D
obviously I typed that one in, like this : D, but together.

 

Dow the bottom of this page click on where it says smiles. That will take you to the page that shows how they are done.

 

Thank you, :yess: .