For some reason (at least using Firefox on 32.0.1 on OS X 10.9.4) this prints with the grid of pages landscape. If it were rotated 90 degrees (printed in the other orientation) then each page could be made larger.
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).
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[ 2.8 ms ] story [ 13.3 ms ] threadHow 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).