So, no mouse movement; That will work perfect (no pun intended). To be forward, I am not anti-mouse, but as the program has so many keyboard shortcuts, a slight bias may start to form.
T for tritone, good to know. Yes, diminished 5th... Less frequently used by composers, but not left out of the scope of possibilities.
(reference to other thread discussion): Found the denemo-console.exe , so CLI will become a frequently used tool here. If I had left the 'tooltips' on, perhaps it would have been found sooner, alas, things are going pretty smoothly now.
Cheers