Hi beachcomber,
It is not working either way. There is no "break line gap"
I have tried following.
Under Dimension Line
stack pitch: -1, -1.5 and other values
Break Line: (negative not allowed)
Under Projection Line
Element Gap: -1, -1.5 and other values
Extension: -1, -1.5 and other values
Break: (negative not allowed)