If you have old or unused accounts in iBank that you no longer want cluttering up your source list, but you don't want to delete them entirely, you can easily hide them from view. Choose Account>Show Account Manager and the following sheet will appear:
Check the box next to any accounts you want to hide, and they will no longer appear in the source list. The balances of hidden accounts will not be counted in the totals displayed below the source list. Uncheck an account in the Account Manager to show it in the source list again. You can return to the Account Manager at any time to show and hide your accounts.