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.
The Fan can also be adjusted by clicking and moving and dragging the center Control Point of the Fan with the mouse.
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.
