This is a sandbox folder - it is used for playing. Press "design" at the bottom of the page.
Now you can reorder and remove items by using the control panel on the right or by dragging and dropping.
Click on an item to see it highlighted in the list and the other way around.
Items can be dragged and dropped on one another to reorder them or onto the "top" and "delete" buttons.
If you remove an item, you can open another Browser window with the sandbox folder and drag the item back into its new place.
Works only with IE6.