¥Rotating the surface:
HMouse button-1: keep it down while moving the mouse left to
right. This rotates the surface about the screen's
Y-axis (dotted green). Let go of button-1.
HRepeat with up and down motion for rotation about X-axis and motion in various directions for rotations mimicking those of a trackball interface.
HAlso try up/down/left/right arrow keys.
åArrow keys rotate by increments specified by the environment variable: SUMA_ArrowRotAngle (degrees).
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