Samsung SCH-R250ZRAMTR - Manual (Page 118)

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Currency — Erasing Exchange Rates
You cannot erase the preloaded currencies from the Exchange Rate
list. You can erase a currency that you have added to the list by doing
the following:
1. From the Tools menu, select Converter ➔ Currency.
2. Press Rate. The EXCHANGE RATE list for the From currency
appears in the display.
3. Use the Up and Down navigation keys to highlight the user-
added currency exchange rate to be erased.
4. Press Erase. You are prompted to confirm the erasure.
Note: The Erase soft key is undefined for preloaded Exchange Rates. This
prevents you from erasing them.
5. To erase the exchange rate, press Yes. To keep the exchange
rate, press No.