Change preset settings in OS X print dialog (Canon iR-ADV 2030i)
I have no idea how to do this via the UI but you can go to ~/Library/Preferences and look for com.apple.print.custompresets.forprinter.*.plist (where * stands for your printer name). The file only exists if you created a custom preset.

You can open the plist with Xcode and edit all printer settings.