So I uninstalled NickelMenu, reinstalled via the link here:
https://www.mobileread.com/forums/sh...&postcount=555
Then added a config file similar to I had before for invert (But in Main instead of reader, and dark_mode instead of invert)
menu_item :main :Invert Screen :nickel_setting :toggle :dark_mode
But I just get an error message that says "unkown setting name 'toggle' (arg: 'toggle:dark_mode')(src/action_cc.cc:340)
Any advice? I also tried "enable" and "disable" instead of toggle.