The keyboard's firmware is very flexible- you can remap all of the keys, and also do things like "mod tap" or "layer tap"- for example, when I tap the backspace

The keyboard's firmware is very flexible- you can remap all of the keys, and also do things like "mod tap" or "layer tap"- for example, when I tap the backspace key (one of the thumb buttons), it sends a backspace. If I hold the key down, it puts they keyboard into a layout where I can more easily access the symbols used commonly in programming. I have the delete key (which is next to it in the thumb cluster) act as an extra Ctrl key when held down. https://zmk.dev/docs/behaviors/hold-tap https://zmk.dev/docs/behaviors/hold-tap