Cash Management Foreign Currency Reconciliation

Have you ever used the "Exchange" Tab on the Bank Statement Interface? I have read through all of the documentation and am still fairly confused as to when that would be used.

I am currently working with reconciliation of a Multi-currency bank account. So far all Bank Accounts are in the same currency as the functional ledger currency. However, my best guess would be to use this feature if you were trying to reconcile a non-functional currency bank account.  (ie. Ledger currency is USD, Bank Currency is EUR and Transaction Currency is JPY)

Any input or advice in general regarding Multi Currency Reconciliation would be greatly appreciated.