I feel silly about posting this here, but haven't found the info anywhere else. I'm using a demo version of 4.5, and if I get an image into preview mode, clicking on the 'restore panes' icon doesn't do anything. I believe I'm currently in "full view" (I see the toolbar, and below that, my image)(clicking on that icon doesn't do anything either), and I'm suspecting 'restore panes' is the one feature that I'm missing - I really want to see the large image in preview mode, and then a little filmstrip of the other images in that folder either above or below that so I can click around really quick.
So I guess I'm asking what exactly is it supposed to do? I've tried previewing just 1 image, and several selected images and neither makes a difference.