The following content in the web page's template: Your Customer System ID number is: {CUSTOMER-SID}
Will display the following when viewing that web page in the storefront: Your Customer System ID number is: 2
Source Code
Source Code Updated:
When a web page using a template that contains this QuickCode Tag is viewed in the storefront, the {CUSTOMER-SID} QuickCode Tag is changed into the source code below prior to the web page being displayed.