Set a base currency and exchange rates
Before you can convert currency, you need to choose a base currency (usually your
domestic currency) and add exchange rates.
The rate of the base currency is always 1. The base currency determines the
conversion rates of the other currencies.
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1. Select Currency as the measurement parameter type, and select Options >
Currency rates. A list of currencies opens; you can see the current base
currency at the top.
2. To change the base currency, scroll to the currency (usually your domestic
currency), and select Options > Set as base curr..
3. Add exchange rates, scroll to the currency, and enter a new rate, that is, how
many units of the currency equal one unit of the base currency you selected.
4. After you insert all the required exchange rates, you can convert currency. See
“Convert units,” p. 51.
Note: When you change base currency, you must enter new exchange rates
because all previously set exchange rates are cleared.