To move nodes with the keyboard:
(1) Use the mouse or the up/down arrow keys to select the node you want to move.
(2) Use these key combinations:
Shift+Up: Move the node up (so it precedes the previous node).
Shift+Down: Move the node down (so it follows the next node).
Shift+Left: Make the node a sibling of its parent node.
Shift+Right: Make the node the child of the node preceding it.