I'm sure you guys area already aware of that part as there have been quite a few complaints and requests on that.
Great suggestion JoAnn! +1 here
Yes indeed! I was also going to mention that.
In Wow slider you have to hack the css file if you want to have the slide show anywhere else than centered (horizontally) on a page. I would appreciate some controls within the programme for that.
Further comparison with Wow slider: I happen to have two versions, 6.3 and 6.9. The older version has no preview, but it has a panel where you can see all your images and move them around in the sequence you want them. That panel is good!
The newer version has a preview, but the images are shown in a vertical list, and if you want to move one from say, the bottom to the top, you need to do that in several steps as you can't see the whole list at a glance.
So please, let us have the possibility to see all the images (not if we have zillions, of course), AND have a preview. If the preview has to be in a separate window, so be it.
Attached is a screen shot of what you have right after you have imported some images in the two versions. Take the best of each.

Inger, Norway
My work in progress:
Components for Site Designer and the HTML Editor: https://mock-up.coffeecup.com