Manual

Chat Memory
By default, when you hit the Enter key to pull up the chat prompt, your chat
will be a /say message. However, if you send a different type of chat, such
as "/party," the next time you pull up your chat prompt, you will still be in
party chat mode. The chat prompt remembers your last chat mode and
stays there until you specify a new one.
Other Chat Commands
Chat usually refers to typed messages, but you can also communicate in
other ways through the chat prompt.
LOOKING FOR PLAYERS? /WHO
The who command lets you look for other players that are online. To use it,
open the chat prompt and type /who [playername]. If the player is on, the
who command will display the player's character name, level, race, class,
guild affiliation, and current zone in your chat log. If the player is not online,
you will see a "0 players total" message.
You can also use the /who command to look for multiple players in a zone
or guild. If your guild name is Blizzard, typing /who Blizzard will show you
all players with Blizzard in their names or in their guild names. You can see
all the players currently in a zone by typing /who [zone name].
If the list includes more than eight players, the who command will instead
open the who list in the Social Window.
/EMOTE
Emoting isn’t technically a form of chat. Instead, emoting is a way for your
character to perform an action or display emotion in the chat log. To emote,
open the chat prompt and type the appropriate emote, such as /thank,
/cheer, or /dance. A text message saying what emote you are performing
will then appear in your chat log, as well as in the chat logs of nearby
players.
Many emotes are also accompanied by an animation that your character
performs. For example, if you perform the cheer emote while playing an
orc character, the chat log will say [Playername] cheers, while your
character pumps both fists jubilantly in the air. Other races might cheer
differently, but your character would still act it out in the game.
If you select a player or NPC when you emote, you will perform the emote
to that target, provided the emote can have a target. If you have nothing
selected or the emote doesn't allow a target, you will perform the emote
to the general public.
A partial list of over 100 emotes can be found online at
http://www.wow-europe.com/en/info/basics/emotes.html.
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