This PCB is for two different installations. The first is the rectangular board with the crescent corners and the other is the large, squarer board within it.  I would like to make three optional "break off" parts, top and bottom as shown with the yellow line and another vertical cut to the immediate left of the long 40 pin connector.

I have looked at V-cut etc but can't see how to specify where I want it.  The only work around I can think of is a row of holes to make a weak section, but that is a bit ragged in appearance.

Can I draw three lines and ask for them to be V-cut?