Accounts Payable accounting definitions

We are using PeopleSoft 9.2 image 51. We are noticing that we have a combination of GL budget strings with a 9000 account numbers that have chartfield values other than account, resource and fund as blanks and then some have zeros instead of blanks. We would like the budget strings to show zeros instead of blanks but I do not know where the accounting definition for these budget strings are configured. We know they are coming from accounts payable vouchers. The Accounts 9110, 9115, 9501, 9510, 9512, 9513.

Can you direct me to where the accounting definitions would be for the above accounts?

Thanks,

Julie