Today I found out the fade in & out selection tool.
Here is a picture:
ORANGE: (Above) Notice that this part of recording is puffed out like the other part of the recording
BLUE: Fade in (left)
RED: Fade out (right)
ORANGE: (Below) Notice that this part of recording is fading in as it goes along to the rest of the recording
So that's what I found out today on Audition. Even though I probably won't use this some time in the future for any jobs, at least I learned something very useful and I'll be ready if I do need to use it!