How does the HUD work?

#1 says, “Don’t know what a button does? Press all four buttons to show a heads-up display (HUD).”

Show it where?


The HUD is only on the Mac. It allows you to run actions from apps that are not connected to another of the buttons. Super handy, but alas Mac-only as it is interactive and wouldn’t make sense on an iPhone.


That said, I’m considering an alternate action for multi-touch, on both iOS and Mac. Happy to hear ideas.