Considerations for Defining Currencies
Consider these points about entering the currency code, date range, or symbol for the currency, when you create or edit currencies.
Currency Codes
You can't change a currency code after you enable the currency, even if you later disable that currency.
Date Ranges
You can enter transactions denominated in the currency only for the dates within the specified range. If you don't enter a start date, then the currency is valid immediately. If you don't enter an end date, then the currency is valid indefinitely.
Symbols
Some applications support displaying currency symbols. You may enter the symbol associated with a currency so that it appears along with the amount.