🚀 go-pugleaf

What Arnis said... 

Of course, that means text won't automatically flow around your foldout. It might also complicate numbering, if it comes in the middle of what would logically be a chapter. For example, since FM5.5 is pre-<$chapnum>, if you're using a footer variable to include the chapter number in your page numbering, you'll need some workaround in the portion of the chapter that comes *after* the foldout, since it won't have the chapter heading. 

In my shop, our final output is always converted to PDF for printing or electronic distribution, so here's what I do: I put a full-page anchored frame (or two, in the case of a double-sided book) in the main flow as a placeholder, work the foldout as a separate FM document not included in the book, and use Acrobat's Document>Replace Pages command to replace the placeholder with the actual foldout in the final product. 

Enjoy! 

-Bill