This is the third of the four major configurations and settings tab. The image below shows the different sub-options available in this area:
(1). Display Options: This tab will allow you to make a general settings for all the currencies you have previously saved in the 'Currency Manage' tab.
(2). Toggle Icon: This is the toggle icon that allows you to toggle ON/OFF whether to show the configured currency on Single Product Page or not.
The currency switcher will then be displayed as a dropdown next to the Add to cart button.