On the server application several activities are matched to specific keys. But I can set another type of keys only on “Position Tracker” tab. I suppose that this is a bug. (And quite unpleasant one, since I don’t have numpad and hence can’t use most of the functions.)
And it would be nice if the hotkeys would consist of several keys by default. Because if you are using keyboard actively, while streaming the image via Trinus VR, you don’t want it to interfere with your keyboard usage.