The currencies set in your account determines what currency your opportunities and orders are shown in.

Master currency

This is the default currency in which your opportunity, sales, and reports are rendered with.

Currencies can at most contain two decimals eg. 01.00

Multi-currency

With this activated you can add more currencies to view your opportunities, orders, and reports in. These currencies have a currency rate that you can edit.

The master currency features is only available in Upsales packages: Plus, Max & Ultimate.

Here's how the currency rate works:

When adding a new currency the currency rate starts at 1. This means that one unit of the master currency is equal to one unit of the currency you are adding. Increasing this number to say 1.2 means that one master currency unit equals 1.2 units of the new currency.
Currency rates are changed manually by the administrators of your account.

Currency settings can be found in Upsales settings under Account. Viewing/editing currencies require administrator access.