Hi Mai,
If you go to General ledger work center and click on Journal Entries view.
Here you can do advance filter and find the journal entry type of posting ( Cash Disbursement for instance) and you can make a note of the diff amount that got posted may be due to payment difference/exchange rate diff etc.,
(One way of finding out which is the journal entry id, you can find this id by going to invoicing & in its document flow.)
Now create a manual Journal entry voucher for this diff account and as you want to move this to another account, select it as offsetting.
Thanks
Lokesh Sharma