I am an amateur, how can I see all code when I create the site?
Simply hit the preview button in Blocs then right click and select inspect element (see below video). Otherwise you can export your site and then open the exported files in an application such as Brackets (make sure not to minify HTML in the export though).
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Sorry it appears that I have been banned from monosnap. As the videos posted were generating too much traffic
Trying to find another solution.
So here is the video: