KML Manager by Group List

I found I could embed each overlay image within a KML file and display them separately. No opacity control, but oh well...

Thanks again for your help!

Hi
Yes, you can control all overlays by setting opacity control.

And for managing by group list - placemarks, paths and KML files (defined by paths).

I thought that managing by ground overlays is not good idea ( it is rare case) I didn't implement for it, only show it and manage opacity