Basically, if I’m printing something in OS X from Preview I want it to scale to fit the page. Luckily, I’m not the only one. To enable this option, use defaults to write a boolean key called PVImagePrintingScaleMode as TRUE and viola:
defaults write com.apple.Preview PVImagePrintingScaleMode -boolean TRUE
To then disable this option, swap PVImagePrintingScaleMode to false:
defaults write com.apple.Preview PVImagePrintingScaleMode -boolean FALSE
