Many people needs to modify the layout of some pdfs an create booklets in order to print it properly. But it's difficult to find a good software to achieve it. Pdfbooklet is a promising application that can do it and it's free. maybe it needs some improvement but it works. It would be great to have the global transformation scale split in two: horizontal scale and vertical scale. And also the option to change the output page type (A4, letter...) Another common option missing here is the "stack all pages", that allows you to see all pages together in order to know the proper margins.
Years ago, I used Adobe Reader to print the booklet of pdf files. After Adobe discontinued the support of new release updates of Adobe Reader for Linux. I found that pdfbooklet is an application that is capable of creating booklet from pdf files. I must give it a try..
I´ve been using this alot more than i thought when i first downloaded.