Help for signal

Usage:  /signal [eventlist [[thinglist] on|off|clear|default]]
        /signal [eventlist] thinglist like other_thing        

The /signal command is used to control when the lily server will include an 
additional signal with the notification for an event. Your client is free to do 
whatever it wants to send this signal, but most of them ring the terminal bell.

/signal [eventlist]

  displays the default signal status and the exceptions to this for the given   
  events, or for all events if none are specified.                              

/signal eventlist on|off

  sets the default signal status for the given events.

/signal eventlist thinglist on|off

  sets the given users or discussions to the given signal status for the given  
  events. This setting overrides the default status just for these users and    
  discussions with respect to the given events.                                 

/signal [eventlist] thinglist clear|default

  resets the given users or discussions back to the default signal status for   
  the given events, or all events if none are specified. This clears any        
  overrides for these users and discussions.                                    

/signal eventlist clear

  clears overrides for all users and discussions for the given events, resetting
  the signal status for all users and discussions back to the currently set     
  default for these events.                                                     

/signal eventlist default

  clears overrides for all users and discussions for the given events and resets
  the default signal status for these events back to the original system        
  default.                                                                      

/signal [eventlist] thinglist like other_thing

  sets the overrides for the given users and discussions to match the overrides 
  of another user or discussion for the given events.                           

all is a special value for eventlist that affects all event types.

(see also: events, notify, when)