Transcription: Not only can you add a sound into the timeline in a layer, you can also easily add a sound to a button state. For example when it's clicked or rolled over by the user's mouse. From the symbol submenu choose interface elements and rollover. This is the single button symbol I've used throughout my website. What I'll do is select the down state and this is when the user clicks on it. Flash has a built-in library of sounds which you access from here. When you're applying a sound to a button state the only way you can do it is to drag it from the library and watch what happens when I do. The one I' ...