When the form being designed is larger than the available design area and a
component is being dragged around to its new location, it is not possible to
reach the destination if it was initially outside the visible area. The only
solution is to drop the component somewhere in the middle (which can have *very*
radical results in the layout), scroll manually, then pick it again, and so on.

I believe that, when approaching the boundaries of the visible area while
dragging a component, the designer should scroll the view appropriately.

Any application that I can think of exhibits this behaviour (even Netbeans
itself when dragging code in the editor window), so that's why I consider this a
usability bug and not an ehnancement request.