Tim
The Junction Dot is an optional indicator designed to show where lines connect. Some applications use a 'humpback bridge' to show where lines cross but do not connect. In Stardraw we do it the other way around and you can use the junction dot to show that crossing lines or T junctions are in fact joined.
In use, the Junction Dot by default snaps to mid- or endpoints or intersections. Kind regards,Rob RobinsonStardraw.com