After I have changed the currency type of OpenERP I saw the symbol of currency symbol at Creating Invoices module, more exactly at inputs ‘Discount Amount’ and ‘Amount Round off’ was not the symbol of the newest currency that it’s selected(in my case USD).
How to change the currency symbol in those fields?
To add different currency in the odoo we need to update the odoo database. In the next image you can see the status of currency EURO is ACTIVE = t(true) but for Swiss Franc is ACTIVE = f(false). To use Swiss Franc in billing odoo system updated it in database and it will be useable in ODOO (Settings → Companies → Click the Company that you need → Edit → Currency → Select the Swiss Franc → Save.
