I have looked at the page properties I can edit in the General and the Document Settings tabs when editing a page. Doing this with the home (or start) page of the example page that came with 0.9.6, I haven’t found the property that determines that it will displayed as my start page.

Chances are I have just overlooked it, or not recognized it.
I have inserted a new page into the document tree that I intended to be my new start page. I have tried to sort the document tree by menu index and moved the new page to the top. That didn’t help. Looking again at the editable page properties didn’t, either.
So even though this is a truly noobish question, I decide to post it here! How can I tell ModX that "this page is to be the new start page"?
There’s a hell of a lot more that I don’t understand, but that’s to come later...

Greets,
René