You use the Change Exchange Rate window to change an exchange rate when posting a journal line or a sales or purchase document.
The window contains one tab with information about the currency, including the currency code, relational currency and relational exchange rate amount. You make the change in the Exchange Rate Amount field or the Relational Exchange Rate Amount field, depending on the option you selected in the Fix Exchange Rate Amount field in the Currency Exchange Rate window. All other fields are inactive and cannot be changed.