Press
To

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 subfolder.

Notes