You can open the friend window by clicking its icon or pressing the B key.
The window is composed of 3 lists: Friend, Blocked and Guild.
Lists on the Friend Window
 Friend List
You can add characters to your friend list and manage them by groups. Use the
[Add Friend] and [Add Group] options at
the bottom of the friend window to edit
your friend list.
You can avoid certain characters by registering them on your blocked list.
Once a character is blocked, not only can
he not whisper to you, but also his messages will not be displayed on your chat windows.
You can create a guild and manage it with notice and group function.
Enables you to add characters to your friend list.
Enables you to add groups to your friend list.
Friend List Options
Friends Display the names of your friends as well as their login status: online or offline.
Press the + key to check your entire friend list, and press the - key to just check the friend groups.
Whisper/Edit Memo/Delete Friend/Invite Party Choose and right click on a friend name to use the commands.
++Shortcut key: B key, + key, - key
Blocked List Options
Add Character Enables you to add a character to your blocked list.
Enables you to release a character from the blocked status.