I love the new multiple leader lines feature of Callouts.    Two thoughts:   Based on how the rest of Vectorworks functions (such as drawing Polylines or Chain Dimensions), I would expect to be able to double-click when placing the final leader line in order to complete the operation. This is not the case. Instead, double clicking inserts two leader lines on top of each other. Only hitting "Esc" finishes the operation.   The other small thing that would help with use