A button can have up to four different states. Each state represents the button's appearance in response to a mouse event:

The Up state is the default or at-rest appearance of the button.

The Over state is the way the button appears when the pointer is moved over it. This state alerts the user that clicking the mouse is likely to result in an action.

The Down state represents the button after it is clicked. Often a concave image of the button is used to signify that it has been pressed. This button state typically represents the current web page on multibutton navigation bars.

The Over While Down state is the appearance when the user moves the pointer over a button that is in the Down state. This button state typically shows that the pointer is over the button for the current web page on multibutton navigation bars.

With the Button Editor, you can create all of these different button states, as well as an area for triggering the button action.