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drag left/rightxz rotation
drag up/downyz rotation
shift+drag left/rightxw rotation
shift+drag up/downyw rotation
alt+shift+drag left/rightxy rotation
alt+shift+drag up/downzw rotation
The rotation UI is currently slightly wonky! This is the result of a refactoring and apparently also of my lack of understanding of Gimbal Locks! I am working on it!
Milosz