Imagine that you have all your 35mm slides, mounted in cardboard or plastic, laid down side by side on a bright light board, with enough ambient light above them that you can read the writing on the mounts -- and now you know what to expect when you view the PSE9 Organizer.
Select, say, a dozen or so slides and, as soon as you click on the last in the group -- pop! -- the entire group lights up due to an illusion of brighter ambient lighting overhead.
This is an interface that former 35-mm slide-makers will feel VERY comfortable with.
Apart from the appearance, in comparison with the PSE7 Organizer this one is VERY zippy, by which I mean the various commands, including opening and closing, occur exceedingly quickly.