Show transaction/event Display Correctly in MIR4 and MIR6 through enhancement

Scenario:
Documents created in MIRO transaction type (subsequent debit) and (subsequent credit) appear otherwise in transactions MIR4 and MIR6.
I have not found any solution for note correction.
I investigated the problem and fix through enhancement due to the need for some customers.

The solution is very simple but of great value to customers.

1) Create an enhancement in the function (MRM_INVOICE_READ) below this point:

data: lw_t_drseg like line of t_drseg.       if sy-tcode = ‘MIR4’ or sy-tcode = ‘MIR6’.          read table t_drseg into lw_t_drseg index 1.          if sy-subrc = 0.            MOVE lw_t_drseg-tbtkz TO e_rbkpv-tbtkz.          endif.       endif.

Display of documents after the implementation of correction:

To (1-Invoice) remains the same:

To (2-Credit memo) remains the same:

Here comes the difference to (3-Subsequent Debit) as seen earlier (1-Invoice)

Here comes the difference to (4-Subsequent Credit) as seen earlier (2-Credit Memo)

Bellow only the two figures before the enhancement as they appeared.

(3-Subsequent Debit) appeared as (1-Invoice)

(4-Subsequent Credit) appeared as (2-Cerdit Memo)

Analyzing tables RBKP and RSEG i could see the following combination:

1-(Invoice)
rbkp-xrech = ‘X’.
rseg-tbtkz  = ‘ ‘.

2-(Credit Memo)
rbkp-xrech = ‘ ‘.
rseg-tbtkz  = ‘ ‘.

3-(Subsequent Debit)
rbkp-xrech = ‘X’.
rseg-tbtkz  = ‘X’.

4-(Subsequent Credit)
rbkp-xrech = ‘ ‘.
rseg-tbtkz  = ‘X’.