I've read your guide Pt 7 to Upfront. Little confused. Hope I you can check my understanding here...
If I select 'No theme' I'll be able to switch to another theme and still see the content of the page.
If I select one of your theme templates (I'm testing with Fixer), I'll be locked in with just your Themes.
I've created a "no template" page http://webandglue.co.uk/test-no-template/
Can you please clarify what you mean by "In order to edit your page content, just double-click it and you’ll return to the page editor." To me this reads as I'l return to the standard WP editor. Is this what you mean? When I edit my text I remain in Upfront. I'm not returned to native WP editor.
Also what are the advantages of using your pre-defined templates, looks like I could simply style using no template.