Hiding NSImageView

FROM : Damien Cooke
DATE : Mon Jun 02 00:07:01 2008

Hi all,
I need to be able to display either one or two images on the screen 
and the choice is made by the user via a button.  So I have built my 
interface with three ImageWells one large ImageWell and also two 1/2 
the size I want to be able to turn them on and off with a button but I 
can find no way of making them transparent or finding any other way of 
hiding them is eluding me.

Can this be done or should I create them programmatically on demand?

Regards
Damien