You can type text messages to your friends in an IM, or chat room sending various 'emotes' and 'stickers'.
Click your mouse into the area that says 'write a message'. Type your message and then press the 'enter' key on your keyboard to send the message. Your message is not sent until you press the enter key.
Click on the 'smiley face' icon to bring up the emote panel.
There are lots of emotes available. On the top of the emote panel you will see various 'tabs'. Click on different tabs to select different emote panels. When you find the perfect emote, just click on it to select it.
To the right of the 'smiley face' icon you see a semi-circle with the top edge peeled back. This is the 'stickers' icon. When you click on it a panel that contains the sticker packs you have will appear. Use the tabs to change between sticker packs.
Send a file or photo
Next is the 'paper clip' icon. Click on the paper clip to send a file or a snapshot from your camera. If you select 'send a file' you can browse your computer, select a file, and then send it. If you 'send a snapshot' your camera will become active, and you can take a snapshot and send it.