To temporarily view the F1, F2, F3 and other fn keys on the Mac Touch Bar:
This will temporarily shift whatever is on the Touch Bar display to the function keys, showing F1, F2, F3, F4 wait.
If you don't want to temporarily see them by holding down the Globe/Fn key Go to the F1 f2 F3 etc. keys on your Mac Touch Bar and you can change the settings so they always show up:
Now the Touch Bar will always Displays the entire row of function key numbers from F1 to F12.
Some users may prefer this setup for certain applications that rely heavily on function keys, while others may just want quick access to keys like F1 F2 F3 by holding down the Globe key. Fortunately, this is your choice.
Obviously, if you don't have a Touch Bar MacBook Pro, this won't apply to you, as all other Mac models have function keys that are always visible on the hardware keyboard, with other system features like display brightness), adjust volume, access Mission Control, and more.
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