T-code: FBL1N is Vendor Line Item.
1. Open Items.
Input customer account and choose open items on 20/03/02.
After executing (press 'F8' key), the open items appear as red light.
2. Cleared Items.
If you want cleared items, choose Cleared items.
I input date from 20/04/01 to 20/05/31.
3. All Items.
If you want to see all items of special period, choose All items.
I selected from 20/04/01 to 20/04/30.
Red items are open (outstanding) and Green items are cleared (paid).
