Understanding buttons

A button created in the Button Editor is more than a regular JavaScript rollover created in Fireworks:

A button is a special type of symbol. You can drag instances of it from the Library into your document. For more information about symbols, see Symbols and instances.
A button is encapsulated. Moving the button in the document moves all of the components and states associated with that button—no more messy multi-frame editing.
A button is easy to edit. Double-click it, and then change it in the Button Editor.
A selected button has a convenient text box in the Object inspector where you can update text on all states simultaneously.
Like any Symbol, buttons made in the Button Editor have a registration point.