There's an icon for a smiley face and a drop down arrow next to it. Select where you want the smiley in your text (idk what it's called, but the little line that shows where you're typing), and then use the arrow to show the smileys and pick which one you want. There's a ton more at the very bottom where it says "show all smileys" and sometimes you use enough of them that you remember what smiley goes to which text, like a colon and a parenthesis make a happy or frowning face depending on which parenthesis you use.