Button Symbol Basics
Flash CS4 Tutorial
How to Create a Flash Button Symbol
Button Symbols are similar to Movie Symbols except they only have three states. You can define the button's Up, Over and Down appearance.
Add a rectangular object to the workspace with the Rectangle tool (r key).
With the rectangle selected, press F8 to convert it to a Symbol.
In the dialog box choose Button for type and name your button.
Using the Selection tool (v key), double-click the button to see the button keyframes.
Click the Over keyframe and press F6. This copy/pastes the Up contents to the Over keyframe.
Click the Down keyframe and press F6. This copy/pastes the Over contents to the Down keyframe.
Click the Hit keyframe and press F6. This copy/pastes the Down contents to the Hit keyframe. The hit contents determines the active or "hot" area for the button.
Click on the Over keyframe to change the appearance of the button in the over state.
Click on the Down keyframe to change the appearance of the button in the down state.
Click the Scene icon to return to the main stage.
To test the appearance of the button, choose Control > Enable Simple Buttons.
Start with your mouse away from the button. Then roll your mouse over the button and finally click it to test all three states.