according to the Ariadna Feature List, "100% of features available without using the mouse".
I have not yet found out how to split/unsplit the current editor window using just the keyboard; and (more annoying) how to jump from one half of the split window into the other without the mouse.
Is this supported? (I did not find a hint in the documentation.)
And if not: Is there a tracker entry? (I did not find one either, but maybe my search was too restrictive.)
Otherwise, I will enter this in the tracker.