@DigitalStefan You can remap every key to any other key, create complex macros, add various layers that can call even more layers, etc. There are mouse controls, a lockable numpad, space cadet modifiers...

In my case, for example, I've set up the two bottom thumb keys as two different layer keys, but they are also used as spacebars when pressed quickly. When holding the right thumb button, F1-F10 are available on the numbers row, F11 and F12 are set on Q and W. It can be customized endlessly.