help/users/umode

   1 MODE <nick> <+|-><modes>
   2
   3 Usermodes:
   4
   5      USERMODE     DESCRIPTION
   6 -----------------------------------------------------------------
   7          +o     - Designates this client is an IRC Operator.
   8                   Use the /oper command to attain this.
   9          +i     - Designates this client 'invisible'.
  10          +g     - "caller id" mode only allow accept clients to message you
  11          +w     - Can see oper wallops.
  12          +D     - Deaf - ignores all channel messages.
  13          +Q     - Prevents you from being affected by channel forwarding.
  14          +R     - Prevents non accept unidentified users from messaging you.