DRAPE

Hello

I have  forexample 100 trees i want ot drape them after clicking Drape Linear Element it starts but 10 out of 100 couldnt be draped and i want to see that undraped elemnts from top view 

HOW CAN I SEE THEM

AGAIN UNDRAPED ELEMENTS FROM TOP VIEW !

(ALL TREES ARE IN SAME LEVEL; SAME COLOUR.When i see them i cant recognize undraped trees)

Please please please somebody help me (emergency) if not i will be fired