Expanding and browsing the tree node using drag-and-drop

Users can drag-and-drop items to the desired location quickly.

1. Select the item(s) you wish to move from one location to the other.
2. Drag them and hover over the tree.
   
   Figure: Expanding and browsing tree node
   
   
   
3. Each node in the tree expands as you hover over. The destination container is highlighted by a blue outline if it is a valid location or it is highlighted by a red outline if it is not valid for dropping the selected item(s).