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          +G     - "soft caller id" mode - same as +g but automatically allows
  12                   anyone who's in a common channel with you to message you.
  13          +w     - Can see oper wallops.
  14          +B     - Marks you as a bot in /whois.
  15          +C     - Prevents you from receiving CTCPs other than ACTION.
  16          +D     - Deaf - ignores all channel messages.
  17          +Q     - Prevents you from being affected by channel forwarding.
  18          +R     - Prevents non accept unidentified users from messaging you.
  19          +V     - Prevents you from receiving invites.
  20          +Z     - Is connected via SSL (cannot be set or unset).