1.DBG> EDIT

      This command spawns the Language-Sensitive Editor (LSE) in a
      subprocess to edit the source file whose code appears in the
      current source display. The editing cursor is positioned at the
      beginning of the line that was centered in the source display.

    2.DBG> EDIT SWAP\12

      This command spawns the Language-Sensitive Editor (LSE) in a
      subprocess to edit the source file containing the module SWAP.
      The editing cursor is positioned at the beginning of source
      line 12.

    3.DBG> SET EDITOR/CALLABLE_EDT
      DBG> EDIT

      In this example, the SET EDITOR/CALLABLE_EDT command
      establishes that EDT is the default editor and is started
      through its callable interface (rather than spawned in a
      subprocess). The EDIT command starts EDT to edit the source
      file whose code appears in the current source display. The
      editing cursor is positioned at the beginning of source line 1,
      because the default qualifier /NOSTART_POSITION applies to EDT.