We are taking the liberty of giving
you a small guide to reading our virtual book.
If the mouse cursor should change form when it moves around
on the screen, by becoming a closed fist with the index
finger raised, this means that by clicking on the object
indicated an action follows.
• If the object is the heading of an index, by clicking
on it you
move on to the next chapter.
• If the object is a photo or a drawing, by pressing
key you get a full-screen view of the image.
• The two Formula Ones on the left hand front page,
and red, allow you to choose Italian or English