The book "Magento Beginner's Guide - Second Edition", by Packt Publishing which is the latest book to be published on Magento as of October 2013, says the following about currency configuration, which is clearly a typo:
Referring to System -> Configuration -> GENERAL -> Currency Setup
The Default Display Currency field can only be set on the Website level. This is the currency that is used to display the price of your products. If you want to use multiple stores using different default currencies, this automatically means that you need to create more Magento Websites. A Store View won't work in such a case.
I am running Magento 220.127.116.11 whose screenshots aren't different here from those of the previous release. As the following screenshot shows the Base Currency must be set at the website level, not the default display currency:
In view of this misprint, could someone please explain to me the difference between "Base Currency", "Default Display Currency", and "Allowed Currencies"?
Thanks a lot.