Before you start
Things you need to know:
The catalog default display currency applies to
The Last browsed block
Set the default tax rate for a catalog
Go to Content > Products > Catalogs.
Find the catalog you want to set the default display currency for, then select Properties. This opens the Edit Insight properties side panel.
Under the heading Currency settings, expand the Default display currency drop-down menu and select the currency you want your catalog data to display in.
Your account-level base currency is selected as default.
The currency you select is now automatically displayed in any commerce blocks you add to your email campaigns, and to product recommendations, which use this catalog as their data source.