This is the custom firmware for the corne ble i built. It is a heavily customized version of zmk. Please read their docs. This is a example/archive of the current firmware on the keyboard. Please make your own if ypu please.
Set os keyboard language to english UK for keymap to be correct. The down arrows shown on the visual keymap example i made that can be seen on the MouseNav and Gaming layers mostly but elsewhere still present mean that it is transparent so it takes on the key from the layer below it (mainly the Base layer). OUT TOG changes from usb C out to Bluetooth if keyboard is plugged in via the left hand side. EP TOG turns the screen on and off.
This is using the nice view screens with nice nano v2 micro controllers. The overall design is called the corne.
The trackpad is called the ploopy trackpad, firmware and support can be found on their web.