The minor axis is an implied line that touches the narrowest points of an ellipse. The minor axis is always perpendicular to the major axis, and always extends into the center line. The center line always goes to a vanishing point.
Minor axis: Shown for ellipses in a 1 point cylinder.
Minor axis: Shown for ellipses in a 2 point cylinder.
Minor axis: Shown for ellipses in 3 point candles.