Different configuration for portrait and landscape

[hackerb9]

The functionality when rotating is quite awkward. #4 suggests locking orientation, which is probably a simpler solution, but I have a different suggestion.

I believe there should be two different keyboard configurations, one for each orientation. For example, as a default, a portrait orientation might show two keyboards, each of one octave. Landscape orientation would have a different default, perhaps one long keyboard of two octaves.