Hi Vignesh,
It depends if your requested field is already available in the selectable fields list, then you can just add it in the layout or simply create a new layout by adding this new field. If your requested field is not available in the SAP provided fields-list, either you can create a separate such custom field in this list, of you can create a new layout altogether and add/enrich it with the new fields business requires. For both of these cases, you will need to work with your ABAP team.
Thanks,
Arijit