Yes, I know about this function - I have been customising the interface by snapping the windows around, but what I mean is that I can't seem to get the contact sheet to 'snap' into position on the left. i.e. no grey box appears when I drag the contact sheet window around and float it over the browser, metadata or history dockwidget... I know it can be done because I have seen your screen shots, but mine doesn't want to do it. I can snap the contact sheet underneath or anywhere on the right side, but just not on the left, and I thought there might be a trick I am missing.