The Extended Keyboard II came with a plastic overlay for the function keys. It showed Cut/Copy/Paste for F2/F3/F4 respectively. See https://chrispeak.com/2022/04/08/apple-extended-ii for a photo.
Not sure if this was ever supported system-wide in any way, though.
The Extended Keyboard not-II had the words printed below they keys. https://deskthority.net/wiki/File:Apple_M0115_top.jpg