The MSG widget is used to report an error that has been
  discovered. You must correct the error before you click
  on the OK button again.

  Click on the Cancel button to reset fields in the Queue
  Options or Print Options box.

  Click on the Queue Options Cancel button to cancel the
  entire print operation.

  Click on the Acknowledge button to signal that you have
  seen the message and want to return to what you were
  doing.