When adding non-debtor address information (i.e. creditors, co-debtors, additional notice parties, etc.) you have two auto-fill options indicated by the buttons next to the address fields.
The common creditor list button opens up to the common creditor list, which displays all the creditors—including those from other client files.
The creditors listed on D, E, F button opens up to all the creditors and addresses listed specifically for the case.