how to add 'profit center' under documents of dynamic selections in FBL5N

Dear Friends,

In fbl1n (vendor line item display) if i choose dynamic selection ..left side of the window consists of fields....under document ...'profit center' is there....

In fbl5n(customer line item display) for the same ,profit center is not there.....!!!

How to add 'profit center' into the available list in FBL5N

Regards,

Madhu..!!!