While focused on a reorder icon, press the Enter key or spacebar to "select" the icon. While a reorder icon is selected, pressing the up and down arrows will change the order of the selected item within the list. Pressing Enter key or spacebar again will drop the selected item at that location in the list.
Reorder keyboard controls
While focused on a reorder icon, press the Enter key or spacebar to "select" the icon. While a reorder icon is selected, pressing the up and down arrows will change the order of the selected item within the list. Pressing Enter key or spacebar again will drop the selected item at that location in the list.