This might not be possible, but its worth asking. I use some of my boxes in workflows as grouping boxes that have nodes and connecting lines contained within it (not in a physical way, just visual). When the flowchart is set to modify behaviour, it is possible to select the contained boxes within that grouping box, but not the arrows. The only way to click on the arrow is to move the back box out of the way to select the arrow. Although the arrow is in front of the back box in Z order, you still can't select it as it the box seems to take presidence in selection terms.

Is there any way to fix this? Let me know if you don't understand the question.

Thats works great, thanks