@SYNTAX:umode@

Format: +|-<modes>

This command is used to manage client's modes in the network.
Note that some of the modes the client cannot set itself.  The
mode is added by adding + before the option(s) and removed by
adding - before the option(s).  The following channel user
modes are available:

    a        Unset all modes
    s        Unset server operator privileges
    r        Unset router operator privileges
    g        Set/unset to be gone (or use /AWAY command)

See also: CMODE, CUMODE, AWAY