Change the journal source and category conversion rules at any time. For example, for any journal source/category combination, you can change the Convert Journals to this Reporting Currency option.
Note that the changes are effective immediately, but that they apply only to new journals.
Caution: It is strongly recommended that you do not change the conversion rules once you begin entering transactions. Doing so may result in inconsistent transaction amounts and account balances between your source ledger (primary or secondary ledger) and its reporting currencies.