Add fields to sort profile in BOP

Hi Gurus,

I can see there are only 29 fields given by SAP for BOP Sort Profile and 19 fields for ODL.

How can we add new standard fields to sort profile. My requirement is to add new fields from Standard SAP only.

But I am not able to add them in the sort profile.

Everywhere I can see is to new Z fields with exit only,

Any idea highly appreciated.

Thanks & Regards,

BK.