1.DBG> SELECT/SOURCE/SCROLL SRC2

      This command selects display SRC2 as the current source and
      scrolling display.

    2.DBG> SELECT/INPUT/ERROR OUT

      This command selects display OUT as the current input and
      error display. This causes debugger input, debugger output
      (assuming OUT is the current output display), and debugger
      diagnostic messages to be logged in the OUT display in the
      correct sequence.

    3.DBG> SELECT/SOURCE

      This command unselects (deletes the source attribute from)
      the currently selected source display. The output of a TYPE
      or EXAMINE/SOURCE command then goes to the currently selected
      output display.