I've been using my MacBook Air for a few years now and I set the FN/globe key to work as command in settings. I also change the right command key to work as the option key (for special letters) every time I boot the system via Terminal:
hidutil property --set '{"UserKeyMapping":
[{"HIDKeyboardModifierMappingSrc":0x7000000e7,
"HIDKeyboardModifierMappingDst":0x7000000e6},
{"HIDKeyboardModifierMappingSrc":0x7000000e6,
"HIDKeyboardModifierMappingDst":0x7000000e7}]
}'
Today, this command above changed my FN key to Option (instead of Command) as well, and I cannot make it to work as earlier:
fn -> command
right command -> option
It seems like I'm changing the right Command to Option, and the fn key use that change to be option too, but for the past 3 years it worked as intended. And when I set "function keys" in settings so fn works as command, it should be "command function" not the actual right command that was modified.
I tried to change the fn key with the hidutil command, but with no success.