It is a system layer that will be in every Fireworks document. Now it's getting really interesting. We don't only have layers, but we also have frames. Whenever you look at the layer panel it only displays the objects in the current frame. Per default every Fireworks document has 1 frame.
Frames are important in creating changing images on Web pages.
Rollover effects are created through replacement of images via Javascript. We will talk about these behaviors later in the tutorial. For now we just need to know that frames can be used to create the different images for these rollovers. In frame 1 of the Fireworks document there is our sad friend. We copy him to frame 2 and make him happy.