One of my friends was over yesterday and playing with iMovie. She wanted to make a movie with pictures from an event we attended. I have used iMovie very little and have searched the web for this problem, but wasn't getting anything that worked so I came here, because someone always gets me straight. I am running 10.12.6 and the latest version of iMovie. She has the images she wants in the movie at the bottom, but it will not let me drag/drop a transition in between them. I have tried clicking on a clip from the movie and double clicking on a transition to add that to both sides of the clip with no luck. What am I doing wrong?