Function Keys on Logitech Craft keyboard do not work
Solution 1:
The Logitech Craft keyboard (like a variety of keyboards these days) have overloaded function keys to provide additional capabilities, such as volume and media controls.
The traditional Fx functionality has been made a secondary feature of these buttons. The access those, you need to hold down the fn along with the Fx.
The fn is one key to the right of the space bar.