<blockquote>gamingislove said: Generally, the drag requires the box to be clickable</blockquote>
This is the issue. If it's just a Content Box Prefab with New UI, it's not clickable. I can attach custom script to move it but if the GUI Content Box is part of a Menu Screen that has also e.g. Button List set up, it won't move them, because they are not set as children or whatever.
Is there a way how to move whole menu with a left mouse button down?