If I understand secondary function correctly, that’s essentially what the FN key does on keyboards it switches it from F1 through 12 to 13 through 23, but they generally use the buttons to control system settings such as your brightness or audio. The FN lock just switched the polarity so it defaults to 13 through 23 instead of 1 through 12
Less fun fact: Some terminal windows will happily process and display such high F-keys as input, leaving you with a screen full of garbage when you return.
F keys go up to 23?? I’m missing out on so many functions!!!
There are 24 function keys on the IBM 122 key layout.
If I understand secondary function correctly, that’s essentially what the FN key does on keyboards it switches it from F1 through 12 to 13 through 23, but they generally use the buttons to control system settings such as your brightness or audio. The FN lock just switched the polarity so it defaults to 13 through 23 instead of 1 through 12
Fun fact: Tools like caffeine use these higher F-keys to bypass locking your desktop due to inactivity.
Less fun fact: Some terminal windows will happily process and display such high F-keys as input, leaving you with a screen full of garbage when you return.