Mouse over effects for buttons

Before we begin, I'd like to clarify a golden rule for creating a great button experience: users should always have a clear indication of which button is currently selected compared to the others. It may sound simple, and many will argue that the Navigator visual available today already solves this problem. However, when we want to go further with custom effects, we will need a bit of retro creativity with our old friends, bookmarks. NOTE: If you are not familiar with how to easily highlight a selected button by changing its background color, you can review that article first. Next, we will lo