z/OS Debugger session panel while debugging a LangX COBOL program

The z/OS® Debugger session panel below shows the information displayed in the Source window while you debug a LangX COBOL program.

 1 LX COBOL LOCATION: COB03O initialization                                       
Command ===>                                                   Scroll ===> PAGE
MONITOR --+----1----+----2----+----3----+----4----+----5----+----6 LINE: 0 OF 0
******************************* TOP OF MONITOR ********************************
****************************** BOTTOM OF MONITOR ******************************
SOURCE: COB03O ---1----+----2----+----3----+----4----+----5----+ LINE: 1 OF 111
    2  1     3 ******************************************************         .
       2       *  PROGRAM NAME: COB03O                              *         .
       3       *                                                    *         .
       4       *  COMPILED WITH IBM OS/VS COBOL COMPILER            *         .
       5       ******************************************************         .
       7        IDENTIFICATION DIVISION.                                      .
       8        PROGRAM-ID. COB03O.                                           .
       9       ************************************************************** .
      10       *                                                              .
      11       * LICENSED MATERIALS - PROPERTY OF IBM                         .
      12       *                                                              .
      13       * 5655-P14: Debug Tool
      14       * (C) Copyright IBM Corp. 2004 All Rights Reserved
      15       *                                                              .
      16       * US GOVERNMENT USERS RESTRICTED RIGHTS - USE, DUPLICATION OR  .
      17       * DISCLOSURE RESTRICTED BY GSA ADP SCHEDULE CONTRACT WITH IBM  .
      18       * CORP.                                                        .
      19       *                                                              .
      20       *                                                              .
      21       ************************************************************** .
      22        ENVIRONMENT DIVISION.                                         .
      23        DATA DIVISION.                                                .
LOG 0----+----1----+----2----+----3----+----4----+----5----+----6- LINE: 1 OF 7
********************************* TOP OF LOG **********************************
IBM z/OS Debugger 16.0.n                 
08/04/2022 03:55:40 AM                    
5724-T07: Copyright IBM Corp. 1992, 2023
0004 *** Commands file commands follow ***                                     
0005  SET MSGID ON ;                                                           
0006  LDD ( COB03O, COB03AO ) ;                                                
0007 EQA1891I *** Commands file commands end ***                               
******************************** BOTTOM OF LOG ********************************
                                                                               
                                                                               
PF  1:?          2:STEP       3:QUIT       4:LIST       5:FIND       6:AT/CLEAR
PF  7:UP         8:DOWN       9:GO        10:ZOOM      11:ZOOM LOG  12:RETRIEVE

The information displayed in the Source window is similar to the listing generated by the COBOL compiler. The Source window displays the following information:

 1  LX COBOL
This indicates that the current source program is LangX COBOL.
 2  line number
The line number is a number assigned by the EQALANGX program by sequentially numbering the source lines. Use the numbers in this column to set breakpoints and identify statements.
 3  source statement
The original source statement.