Noooo I said theres no easy way...Heres one way...after you finish your song...
1. right click on the master channel and choose open audio editor, this will open edison.
2. Hit RECORD in edison
3. Hit your main PLAY, this will record your whole song in edison.
4. Highlite from where you want your fade out to begin to where you want it to end, then push the fade out button in edison.
5. Save your song from edison.
The problem with this is your have 2 copies of your song which imo is a waste of space, RAM, everything...its ALOT of work just to do a simple task.