How to control/set up the ability of which some users can see all digits for the Supplier Bank Acco

In 11i,  there is some setup which can control the fact that some users can see all digits for the Supplier Bank Accounts but some users can only see the last few digits.

In R12.1.3,   under the Payment Administrator > Oracle Payments Setup >  System Security Options >  Payment Instrument Masking :  We could set up the "Number of digits to Display" for the external bank accounts.  But I can not find the place to set up the control of which some users can see all digits for the Supplier Bank Accounts but some users can only see partial.  Does any one know the setup and have a document?