ACDOCP. adding LIFNR (vendor)

Hi guys,

I have a requirement to add LIFNR (vendor) to ACDOCP.

It is not just a field creation, it is bringing a field to ACDOCP, a field that is already available in ACDOCA.

Coding block in OXK3 I guess will not do the job, because I cannot find an option to add existing field.

ideas please ? Is there a function to bring ACDOCA field to ACDOCP ?

Regards,

Laimonas