Keyboard navigation keys – Tab, Shift, Arrow keys, Alt, Spacebar, Enter and Esc. Google Search ‘microsoft using your keyboard’
Use Tab to move focus, Shift + Tab to change direction, Arrow keys to move selected option, Spacebar to reveal options or expand folder contect (disclosure button), Enter to action a selection (e.g. open a file), Alt to show hidden options available with keyboard keys and Escape key ‘Esc’ which is the same as clicking the ‘Cancel’ button or closing a menu without choosing an item