Sets the vertical distance (in points) from the edge of the text bounding box to the place where the callout line attaches to the text box. This distance is measured from the top of the text box unless the AutoAttach property is set to True and the text box is to the left of the origin of the callout line (the place that the callout points to), in which case the drop distance is measured from the bottom of the text box.
Syntax
expression.CustomDrop(Drop)
expression Required. An expression that returns a CalloutFormat object.
Drop Required Single. The drop distance, in points.