ESS 60.2 How to edit Who's Who

Hi,

1) For transaction "pz01c", how do I add/remove fields to the selection/list/detail tabs. It seems to be read-only? I even tried with a user with SAP_ALL rights.

2) What's the difference between transaction "pzwhoc" and "pz01c"? I also read somewhere that Who's Who can be configured that way but for me the fields in "pz01c" seems to reflect what I see on my portal screen.

Thanks,