"Printing" to PDF Questions

[Woody44]

I self-publish books through Amazon KDP. The preferred upload to Amazon is a PDF with fonts embedded.

I just tried to create a PDF from a third-party program (app) using the FlexiPDF virtual printer. The page size of the document is 6 inches by 9 inches (a standard book size in the U.S.). FlexiPDF put the document in the correct type size, but on 8-1/2-incj by 11-inch pages. How do I set the correct page size in FlexiPDF?

Also, there was nothing to indicate whether or not fonts are being embedded. Obviously, my system has the fonts I use already installed, but how can I verify that the fonts are embedded in case Amazon's system doesn't have one or more of the fonts I use? (Which would be likely, since I have Megafont NOW and I use some of those fonts in my books.)