This is a pretty basic command and not exactly earth-shattering, but I had no idea that it existed until today. I found it when I was reading through some of the commands in the command editor. This could be helpful after a long day of editing a radio cut and dealing with expanded audio and b-roll.
Over the past two years, I spent hundreds of hours intensely studying FCPX to see if I could use it to edit broadcast news stories that I had cut for years in FCP legacy. In recent months, I was finally able to put finger to keyboard and write a bit of a tutorial/manifesto/documentation about my experiences and techniques.
I hope you enjoy this article as much as I did writing it.