Stacked Balloon with no frame

Does anyone know how to create a stacked balloon with no frame?

If I add a stacked ballon to an existing (framed) ballon, I do not have the option to pick style=none. If I start out with an unframed balloon, style=none, when I right click, I am not able to select "add to stack"

please help.

I have attached the dialog box for discussion:

SolidworksDrawings And Detailing