Compatibility with Logitech Logi Options+: Fn keys
This was discovered when using an MX Keys keyboard with the “Logi Options+” software. While Karabiner Elements is running, the Logitech specific function keys (such as
Fn-esc to toggle between function keys and media keys and
f3 to switch between inputs) are not recognized.
The solution is to edit
karabiner.json such that the
"fn_function_keys" array is empty: