I was wondering how Magento merge or handle into handle in layout. I was expecting something like Obviously, there is not such codes in layouts. I searched within Magento folder for keyword “customer_logged_in”, but only occurrences I could find in layout/customer.xml. So, how is customer_logged_in/out handle added to Magento layout? At last, I found by… Continue reading How is customer_logged_in/out handle added to Magento layout?