Fan Distance is the height of the fan from the center of the end objects.
Positive value fans the objects Upwards.
Negative value fans the objects Downward.
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The Fan can also be adjusted by clicking and moving and dragging the center Control Point of the Fan with the mouse.
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If the fan is unselected (i.e., the mouse is clicked elsewhere on the design), reselect the objects and click Set Fan to reinstate the fan function to edit it.
