How to use the greenscreen effect on Imovie 10.1?
I have no idea how to turn on advanced tools for this iMovie version, there's nothing under preferences, how do I use the greenscreen effect/ any other adnaced tool such as image inside of an image etc.
I'm on OS X YOSEMITE 10.10.5
iMovie 10, OS X Yosemite (10.10.5)