I made a quick screen cast where I opened up a Room preset that has the Decay knob mapped to the HotSwitch. Originally, the HotSwitch toggles between 0.59S and 1.83S. In the screen cast I change it to toggle between 0.59S and 0.0S.
https://www.youtube.com/watch?v=GruBDOll9z4&feature=youtu.be
You'll see that long pressing the HotSwitch literally just means keeping your mouse pressed on the HotSwitch for a second or so. That's a familiar gesture in the iOS world. I suppose on the desktop it should also be possible to right click on the HotSwitch to do this, as that's a more familiar interaction in the desktop world.
You don't need to have an H9 connected to create or change a new HotSwitch mapping, and changes to the mappings always get saved with the preset.
