Choose the Show Command... menu item to enter CMS
  command-line commands at the CMS prompt.   The output
  appears in the CMS Command window.

  When you choose the Show Command... menu item, a dialog
  box appears with a display window, a smaller input window
  containing the CMS prompt (CMS>), and the Clear Command
  Window and Cancel buttons.

1  –  Sh co

  The CMS Command output window displays the output when
  you enter CMS commands at the CMS prompt (CMS>).

2  –  Sh iw

  Enter commands in the CMS command-line interface by
  typing them at the CMS prompt (CMS>).  Command output is
  displayed in the main window.

3  –  Sh cl

  Click on the Clear Command Window button to clear the
  contents of the output window.