Another major feature that Macro HTML offers are tokens. They are much more human readable formatting markers that the compiler turns into fully formed HTML. You can find a full list here.
For example, change the text 'But sites made with MacroHTML...' to '**But sites made with MacroHTML**...' Press Save and Build. View the finished page in the 'View' tab. Notice that that text is now bold. Check out some of the other simple formatting things back in the edit page.