Windows Explorer keyboard shortcuts

END Display the bottom of the active window.
HOME Display the top of the active window.
NUM LOCK+ASTERISK on numeric keypad (*) Display all subfolders under the selected folder.
NUM LOCK+PLUS SIGN on numeric keypad (+) Display the contents of the selected folder.
NUM LOCK+MINUS SIGN on numeric keypad (-) Collapse the selected folder.
LEFT ARROW Collapse current selection if it's expanded, or select parent folder.
RIGHT ARROW Display current selection if it's collapsed, or select first subfolde