Whenever you hold down a key in Linux, it always repeats, and there is no GUI to turn this into an accented character selector. Or any other means because ther

Whenever you hold down a key in Linux, it always repeats, and there is no GUI to turn this into an accented character selector. Or any other means because there is no such selector to be had. Not a big knock on Linux though, because it has a working compose key instead. Also, you don't need to reboot after toggling ApplePressAndHoldEnabled, but you do need to restart apps.