Shortcuts you can use with Windows Explorer:

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