/who : Gives you a list of the people in that channel.

/whisper : Sends a private message to this player. (Short form: /w or /msg)

/squelch : Ignore messages from this player. The said player will bemarked with a red X in place of his or her character icon. Also /ignore

/unsquelch : Turns off squelch for this player.

/join : Lets you join the chosen channel. Also /channel

/users: Lets you know how many users/players are online.

/rejoin: Lets you rejoin the current channel, used mostly if you want to be at the end of the list or is you want to improve your lag (often works).

Alt V: Toggles player joining/leaving notifications.

/away : Tells the chat room that you are gone with a reson. Type in /away again to toggle it.

/whoami: Tells you who you are, where you are, and your account number.

To quickly enter a player's name, double click on the player's name from the list at the right or single click and press CTRL+N.

* Channel OP: He or she is the one who is in charge of a private channel. The OP is the one who assumes responsibility for the etiquette and language within the private channel. A brown gavel or hammer, instead of the character icon, marks the channel OP (aside from the fact that he or she is always on top).

/kick : The ability of the channel OP to "remove" a player from the channel. This is often used as a tool of discipline or just for fun in most guild channels.

/ban : This is the most powerful command that a channel OP can use. It will literally "ban" a player from the present channel, and he won't be able to re-enter it, unless he or she is unbanned by the OP or if a new OP takes over. This is often abused by many channel OPs, but it is undeniably the best channel quality control tool in Battle.Net.

/unban : This command negates the /ban command the OP has given a particular player, allowing that player to successfully re-enter the channel.

/designate : This allows the OP to choose his or her successor. The player who is designated will become the channel OP if ever the current OP decides to leave or step down.

/resign or /rejoin: This command simply allows the OP to step down as a regular channel chatter. If the OP did not designate a player to a successor before he or she executed the command, the second player in the list (below the OP) will become that channel's next OP.