To fix this, you need to use your favourite text editor to modify the system file /System -> Library -> Frameworks -> ApplicationServices.framework -> Versions -> A -> Frameworks -> PrintCore.framework -> Versions -> A -> Resources -> PaperInfo.xml.
- Open Terminal
- Type:
cd /System/Library/Frameworks/ApplicationServices.framework/
cd Versions/A/Frameworks/PrintCore.framework/Versions/A/Resources/ - Type sudo cp PaperInfo.xml PaperInfo.xml_backup, then enter your password.
- Type sudo pico PaperInfo.xml.
- Hit Control-W to search, and enter A4 as the search string, then hit return.
- Press the down arrow until you see this line, which is the setting for the bottom margin:
7.830000000000000e+02
- Change 7.83 to 8.06.
- Hit Control-O to save, and hit return to accept the filename and save.
- Type Control-X to exit.
- Type exit to close the Terminal.
- Open any application you can print from.
- Select Page Setup from the File Menu.
- Click on the pop-up menu Settings and select Summary.

