The page related settings have a different behavior than the other settings (save, compression, fonts, security,...). While the last are specific to the novaPDF printer driver, the page related settings are used for all printer drivers and can be set by system calls (check the DEVMODE Windows structure).
When integrating novaPDF SDK in a 32bit application that will be distributed on Windows x64 systems too, you have to take into account some aspects regarding the default behavior of our installer. One of these is the novaPDF installer that contains both 32 bit and 64 bit versions of the novaPDF driver and of the COM interface. Because of its built-in automatic detection, when installing novaPDF on Windows x64 computers (via your application), the 64bit version of the driver and COM interface are installed (and not the 32bit version).