I'm not sure what it's called. But when I want to adjust/move-around the audio in a video, WITHOUT moving/adjusting the video, I have to first "disconnect" the audio from the video.

I normally do this by doing a quick "cut n paste" of the audio or the video. Then, I can move/adjust either of them independently.

But there's gotta be an easier (more standard) way to do this. What is it?