Smooth Scrolling made clear and easy

Question

A new folio appeared in Bob Bringhurst's jewel app "DPS Tips", discussing all kinds of special content and interaction. In the Smooth Scrolling section it states that you cannot create Smooth Scrolling articles simply by "Adding" an article. This should be achieved by "Importing" Articles. And it specifically states that you can't create horizontally scrolling articles. This baffles me ! I know it can be a bit tricky, but when explained and understood carefully, there's no problem in using the "Add" button or even to create a horizontally scrolling article on the fly.
The tricky part is, how the InDesign file (an article's half) is 'born'. To be able to use the "Add" button to create a properly scrolling article, you must check that the Document Setup upon making a new file (or even later on) is set to the proper single-page size (in a 3:4 dimension) and with the desired orientation (landscape or portrait), before you hit the "Add" button. Because this is where the Folio Builder gets its information from about the dimension and orientation. Afterwards, you set the page's length with the Page Selection tool – but take care: ONLY the length ! DO NOT use the width or orientation properties with this tool, nor use the Height setting in the Document Setup, although these seem very obvious for this task. You can even correct a page afterwards, and get the "adding" right (and lengthen it properly) if it has been malformed and unaccepted by the Folio Builder before.
So, to conclude: start a scrolling page with a single page, normal size (1024x768), landscape or portrait, add it to the Folio, and then lengthen the page with the Page tool's Height setting. Don't forget to set the Smooth Scrolling option accordingly among the Article's properties in the Folio Builder panel. No big deal !

Answer 1

That's indeed the culprit: when you have already set the elongated landscape page upon New Document. But it's still easy to correct that afterwards: switch it back to 768 in Document Settings (the cropped content becomes invisible but remains in place), aAdd the layout (it will become the landscape version), and stretch the page to the desired length with the Page tool's Height property.
Both methods can be difficult, depending on the way you prefer to work. Visual designers who already find it hard to keep track of a Package folder will shiver upon seeing the rigid hierarchy of a Folio folder; technical users won't mind preparing a folder stucture like that. Using ADPS requires many more unlogical steps than just this, like updating a design (not at folio or layout level, but only the whole Article) or discovering that one missing or extraneous orientation prevents the folio to be previewed.
So either way it is fishy...
But I'm glad that this aspect will be tackled by an update, soon !