I'll give my example as it explains exactly what I mean. We have a store that on the main menu has a "Shop" link that when hovered over, will display a dropdown menu of categories and subcategories. ...
I'm developing a drag-and-drop reordering interface for books on shelves. (You can try it live if you're on the latest WebKit.) When you drag a book over a shelf, it accommodates space for it by ...