While enthusiast mechanical keyboards are getting more compact with each passing year, Razer is going in the opposite direction with its new BlackWidow V4 Pro. It uses a full-size keyboard layout as its base (complete with a numpad) but adds over half a dozen extra buttons and dials that can be programmed for use in games and productivity programs alike.
So, for starters, on the far left of the keyboard, there are five macro keys. They’re join...