What are the commands that I can use on the chat network?

The following are the basic commands that anyone can use in a chatroom:

/part chatroomName
Type /part devart will let you leave (part) the #devart chatroom (without closing any other chatroom you may be connected to).

/me action
Type /me runs about will produce * yourusername runs about in the chat room.

/whois username
Will show you which rooms the username is currently chatting in.

Highlighting / Nick Complete
To quickly type a username, or to make sure you type it correctly, type the first one or two letters then hit "TAB" on your keyboard to have the username automatically filled in

/clear
Type /clear to remove all of the current text from the chat window.

/help
Type /help at any time to get to the FAQ.

/join roomname
Type /join roomname to quickly join another room. You can also simply click the +more button beside the chatroom tab to see a list of chatrooms, and then click on the name of the chatroom.

/note username
Typing /note JoeBloggs will open the notes page, so that you can send a note to the username you have specified.

/admin show users [GroupName]
Type /admin show users to show all the users who are members of all the different Groups in the chatroom. You can also type /admin show users Moderators to just show the users in the Moderator group (for example).

/admin show privclass
Type /admin show privclass to display all the different Groups in the chatroom and how they are currently setup and privileged to do things.

Formatting:

You can also use all the normal HTML formatting and special codes that are listed in
FAQ #104: What HTML formatting can we use on deviantART? And what is the format for these codes?,
along with emoticons and these additional ones:

<iframe src="url" width=.. height=.. />
This allows you to display a webpage in the chat. For example, if you wanted to show google.com, you'd write <iframe src="[link]" width=100 height=100 /> and it would display the webpage in a window sized 100 x 100 pixels. To view the embedded object, you must hover your cursor over the link and click the Maximize icon next to the url.

[link] (deviantART)
As an alternative to <a href="[link]">deviantart.com</a> or simply pasting the URL, you can also use this special link code. Type: [link] (deviantART) to display a clickable link, that says deviantART.

<img src="URL" />
To display an image in dAmn, use the normal HTML code <img src="URL" />. Note, again to view the embedded object, you must hover your cursor over the link and click the Maximize icon next to the url.

:iconUsername:
Type :iconUsername: to display a clickable link with the username's avatar.

:devUsername:
Type :devUsername: to display a clickable link with the usernames's name.

These commands require that you have been given the proper privileges by the Founder of the room:

/topic topic
Sets the channel topic. (ie. /topic Welcome to #devart!)

/title title
Sets the channel title. (ie. /title Today is @MNBot's birthday)

/demote username
Use this to move a user down an access level. (ie, from member to guest)

/promote username
Use this to move a user up an access level. (ie, from guest to member)

/promote username Operators
Moves a user directly into the operator access level group. This can also be used with demote, and with any level. (ie, you can also do /demote username Guest too for example).

/kick username [reason]
Removes a user from the chat. Add a reason to let the user know why they were kicked.

/ban username
This removes the user from the chat for a prolonged amount of time, until their ban is removed.

/unban username
This unbans the user by moving them from the Ban Group to the Guests Group