When creating or editing an invoice, a "Invoice Currency" metabox appears on the right side of the editor. Open the invoice editor (Invoices > Invoices > Edit) Look for the "Invoice Currency" metabox on the right side Select the desired currency from the dropdown The dropdown shows all configured currencies with their names and codes Default currency is used if none is selected Save the invoice to persist the currency selection The selected currency's symbol is displayed when viewing the invoice All amounts are formatted using the currency's decimal places and symbol position Exchange rate is used only for payment processing (see "Payment Calculation" below) Invoice totals are displayed in the selected currency