"change keyboard type" in keyboard preferences is missing
I just connected a new keyboard to my iMac. I need to switch the type of keyboard but when I go to the apple menu / system preferences / keyboard / keyboard / the button ""change keyboard type" that should be on the lower left corner *according to another postis missing.
The keyboard I am trying to install is a brand new Magic keyboard with numeric keypad 'Spanish', connecting to imac on High Sierra Version 10.13.6
iMac 27″, macOS 10.13