How can we change set of chained dims to separate dimensions

The chained dims is great  for keeping all your dims neat and in line  but I often need to edit them  some times even  remove one from the mix, delete vertice does remove but it extends the adjacent one to make it still stay chained...

I don't want to do the dims one at a time the chain function is awesome for doing them first pass... 

I cant  find a way to drop or convert to single or drop association of the chaining... tried most things I can think of...if I drop dims from the drop tool  they stop being dims, if I only tick complex it does nothing to the dims

if I select all the chained dim and  use the drop association keyin  again nothing changes still chained dims....

Maybe it needs to be a vba command or vba programming ...