I 'm using SAP 4.6C, we have two special ledger Z1 and Z2, in GCL2, if I select Z1 and click coding block button, it shows GL account, business area, cost center, reference key 1.
if I select Z2, coding block shows: GL account, order, cost center. so my first question is how to change Z2 and add field reference key 1 in the coding block?
I checked OXK3, I find there is no customer include structure, but I didn't find reference key 1 appeared in append structure of OXK3.
my second question is how to list all the available field in ledger Z2?
My third question: if I want to add one field reference key 3 in Z2 after golive (we already go live two years). what steps need to be done?