Usage: Echo [on/off] [data, variables]
  Used to set, or display the current echo status.  When ECHO is on, your
  keystrokes will be echoed to you, when ECHO is off, your keystrokes will
  not be echoed to you.  When called without parameters, ECHO will display
  the current echo state.  If data or variables are specified, they will
  be echoed to your screen.

  Example: /echo on
           Will turn echo on

           /echo off
           Will turn echo off

           /echo $T
           Will echo the current time

