There should be a "Source" tab to view the source code.

In version 8, the web editor gives you a much better preview of all those styles. things like floating, absolute, margins, etc, work flawlessly, and you get immediate preview when you remove the mouse from the central area. These improvements, together with the new capability for choosing which parts of an If widget you want to see (or which placeholders are displayed in the editor) allow you to work with the content as it will look at runtime depending on the conditions.








And if you ever need to understand the structure of the page (or work with it directly as if you were working with the "Raw Html tags", you can do it via the widgets tree directly. Whenever you drag something to the UI editor, the tree is displayed immediately, and you get the exact notion of where you're placing the new widgets. 

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And the Tree Widget synchronized...