Block Neighbours command (Edit-Tools menu)

Opens up a dialog to set up blocks connected to the currently selected block.

Usually only the first and second values of the first column are used; first is the block following the currently selected block and the second is the preceding block.

Connect close points to near points of neighbour blocks if distance is less than:

If enabled, it will connect points closest to the ones of neighbour blocks if the distance is less than the specified one.