TinTin++ Mud Client Manual

Command: #debug {listname} {on|off|log}

         Toggles a list on or off. With no argument it shows your current
         settings, as well as the list names that you can debug.

         If you for example set ACTIONS to ON you will get debug information
         whenever an action is triggered.

         #debug {listname} {log} will silently write debugging information to
         the log file, you must be logging in order for this to work.

         Not every list has debug support yet.

Related: class, ignore, info, kill and message.