This is a documentation page for an old feature. I don't think this is really in the spirit of "Show HN" (as pointed out by another commenter on one of the 8 other recent "Show HN" posts for this product https://news.ycombinator.com/item?id=11489452).
The feature that is brand new is the master page stuff which makes it much easier to create a serious site.
From the "Show HN" guidelines:
New features and upgrades ("Foo 1.3.1 is out") generally aren't substantive enough to be Show HNs. A major overhaul is probably ok.