Can not find excahneg rate section in setting

I am using cloud version, can not find multi-currency setting, and exchange rate although i set up base currency.
Please help.

the exchange rates under Settings will appear only if you have created any accounts in a different currency other than your base currency.

read this guide on using multiple currencies Manager Cloud

thank you, but i have ever try making base currency,
and after setting base currency, when we export the data to excel file format,
excel file doesn’t recognize the figures as numbers, it recognize as text, and we can not sort the figures

when we remove the basic currency, we can export the figure to excel as numbers (digit) format.

this is a problem related to excel and not Manager.
in excel just select the column representing the currency and change its format to Numbers.