If you are editing a Flash file like a menu and you can’t open the “Actions – Button” panel and only you see is “Actions – Frame” and you are 100% sure that you are dealing with actual buttons here is what you do:

Where you can see the layers, there is a lock icon, for every layer there must be a dot under it rather than a lock; so you have to unlock the layers before you can see the “Actions – Button” layer. To do this, simply click on each layer’s lock icon and that will turn it into a dot. Then go to “Window > Actions” and select a button and voila.

I hope this helps someone

It’s very simple, hit F9

I wish it was more obvious to beginners though.