I'm using the ACM "Tighter Alternate style" to write a document. The submission instructions state that I have to create a PDF in US letter format but unfortunately, my PDF is A4. How can I change this to US letter?
I have tried the geometry package (\usepackage[letterpaper]{geometry}), but this produces 6 instead of 4 pages and I can read everywhere, that there are only slight differences between both sizes... Additionally, I looked into the config.ps as described here, but proposed lines to change exist both in my config.ps.