The tertiary options for the keys are not accessible for me, despite having chosen the correct-seeming option in the keyboard layouts settings. That is, I cannot access the euro sign or the backslash, which would have been ALT+SHIFT+4 and ALT-SHIFT-7 on my Norwegian Macbook keyboard, on macOS. Indeed, the ALT key simply does nothing for me anymore with respect to accessing extra keys. How would I go about fixing this? PS: my keyboard does not have a numpad and does not look like the layout for any of the Norwegian keyboards in the layouts options.