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On exit, or any time for that matter, we may want to save some settings. It would be nice if all these save settings could be gathered into one. As I've shown in the mock-up below, except on exit close could be replaced with 2 buttons, cancel and exit.
you could have a save/reset button next to each for easy access to specifically save or not save any set of presets. And when finally exiting, if any preset is not saved, then have the warning as usual.
And a subtle suggestion to change printer settings to be machine settings, merely because it's visually more distinctive and would prevent late night whoopsies. :) <- just a thought, not a big issue.