Show HN: The Little Book
blog.153.io
blog.153.io
How would printing it portrait allow larger pages? The pages are each an 8th of a sheet, it's physically impossible to get them any larger :)
EDIT: unless you mean it prints a reduced size landscape version on a portrait screen, in which case I have no control over that AFAIK. Change it to landscape in your print settings (and turn off any margins if you can).