Help for settings timeouts

The following settings affect how long you can be inactive before your status 
changes:

  idle_threshold:  sets when people show as "idle", when their idle column      
                   changes from blank to a time since last input. The default   
                   idle_threshold is 2 minutes and can be set for up to 30      
                   minutes.                                                     
                                                                                
  idle_away:       sets how long you can be idle before being "idled away" by   
                   the system. The default value is 2 hours and may be set up to
                   8 hours.                                                     
                                                                                
  idle_off:        sets how long you can remain detached before the server      
                   automatically logs you out. The maximum (and default) value  
                   is 1 year. The minimum value is 1 day.                       

(see also: set, here, away, detach)