I selected a template, while in the page design mode. Now, I can't seem to get back to the drag and drop editor that I had, before. How do I get that back?
I'm not sure if I know what you're refrencing exactly, but if it's this screen:
Then you can get back to it by including ?customizeNow=true after your page in the URL.
For the welcome page this would be:
Retrieving data ...