Motion speed should most often occur at the following standard increments.
psMotionSpeedXSlow
psMotionSpeedSlow
psMotionSpeedNormal
psMotionSpeedFast
psMotionSpeedXFast
Some general guidance on selecting a duration.
A small object moving a great relative distance may have slightly longer duration so that the movement isnβt too fast and abrupt.
Some general guidance on selecting an easing curve.
Generally, larger objects look more natural when rotating slower than smaller objects. The easing property for rotation should be linear.