How do you swap your PIP video/image with the main storyline for a given timeframe. I cannot believe such a simple function in iMovie is not easily done in FCPX and I cannot find anything on the Internet about it. Please help!

I don't have FCPX here to experiment with, but I'll link this thread to a basic FCPX course, maybe one of our FCPX gurus will have the answer.. If I had to guess, maybe I'd guess it would involve combining the PIP and main clips into a multicam clip (?), but I'm sure a real FCPX expert would know the most straightforward way..