The CURRENCY menu in the System module allows you to setup exchange rates between a base currency and various other currencies; the exchange rates may then be used in various places in Microbizz.
This is still in the very early stages, and needs to be enabled by Ventu.
First you have to select a base currency, which will usually be the currency that you use for invoicing.
The Enabled column specifies if the currency should be available in your system. The Static column determines if you use a static exchange rate, or if you want to use the rate coming from the provider.
When editing an invoice line, and click on the Unit price field, the following will appear:
Here the base currency for the system is DKK, but the invoice line is 4 AUD, which is converted to 20.48 DKK.