Customer credit management change: "FD32"

Hello to everyone,

When i run the transaction FD32 ( credit control area data ) and the flag STATUS. i can modificate the field "credit limit --> KNKK-KLIMK" but i cant modificate the other fields for example like "sec. receivables --> KNKK-ABSBT".

I need change it field in customizing.. someone know where can i do it??

Many thanx