I am unable to set the Alpha (transparency) for the background color of a button. Is this by design? I would very much like to be able to do that.
I want that in order to put a frame around an existing feature on an image (i.e. a map), and have the frame include security to control its action. I learned, for instance, that containers will not provide the security features that I want. Are there components which provide both the security and the transparency?