Hi, the code is from an hosted button which means the code is hosted on a PayPal server and visible only to the account that created the button. That's why you only see few lines and not the usual code lines of an html button.
Just to add, if you're referring to the "email" tab which contains the URL button code, then this may not be available in some cases, e.g. where the button contains a text field, drop down or some other form of user input.
