If you take a look at your laptop's keyboard, you'll notice that the top row keys have icons printed above, with "F" and a number, like F1, F2, and so on, below each one. These are known as function ...
In order to use the Secret Garden Key, you must find a locked door on the furthest east or furthest west side of the mansion. Make your way to either side of the house, and continue to draft rooms ...