Examine the photograph below of a person's living room, and think of what issues might be raised by the objects in the room, and the setting. Move the mouse over the photo, and where you reach a 'hotspot' (the cursor turns into a hand) click on it to read notes.
This layer holds notes displayed when user clicks a hotspot. It's set to invisible in the style sheet, and is only rendered visible in page code. It's placed at the very page end, outside the container <div>, so as not to create white space on the main page.