To execute only one command, enter command mode by pressing the Do key,
  which is bound to GOTO COMMAND.  Type the command at the LSE>
  prompt and press the Return key. The command executes and LSE
  returns to keypad mode.  In DECwindows LSE, you can also enter command
  mode by clicking MB1 below the status line.

  LSE provides multiple command recall; by using the up and down arrow keys
  at the LSE Command> prompt, you can recall any of the commands you
  issued during your current editing session.

  LSE also provides continuation lines; by using a hyphen, "-", as the last
  character on the line LSE's command may be continued on the next line.

  To execute several commands, enter command mode by pressing CTRL/Z. Type
  the first command at the LSE> prompt and terminate the command string by
  pressing the Return key. You will still be at the LSE> prompt after the command
  executes.  Enter a null command (carriage return) to return to keypad mode.

  To cancel a command, press CTRL/C in response to a prompt. For
  example, pressing CTRL/C in response to the Search for: prompt cancels the
  SEARCH command.  Enter a null command (carriage return) to the LSE>
  prompt to return to keypad mode.