TinTin++ Mud Client Manual
         ECHO

Command: #echo {format} {argument1} {argument2} {etc}

         Echo command displays text on the screen with formatting options. See
         the help file for the format command for more information.

         The echo command does not trigger actions.

         As with the #show command you can split the {format} argument up into
         two braced arguments, in which case the 2nd argument is the row number.

Example: #echo {The current date is %t.} {%Y-%m-%d %H:%M:%S}
         #echo {[%38s][%-38s]} {Hello World} {Hello World}
         #echo {{this is %s on the top row} {-1}} {printed}

Related: buffer, format, grep and showme.