I'm running iMovie 10.1.6 on MacOS Sierra 10.12.6 on a brand new, 2017 MacBook Air.
I have a clip which I want to flip/invert horizontally so that writing which currently appears with writing in reverse, so it is unreadable.
I've read up a lot online and everything I find says I should select the clip, click on the icon above the clip preview which is like 3 overlapping circles and then select Video Effect and choose Flipped.
However, when I click on the 3 circles icon, there is no Video Effects option shown, only Clip Filter and Audio Effect, so I don't know how to get this done.
I'm tearing my hair out at this and would really appreciate some help from anyone who can solve my problem. I know I don't have much rep here – I wish I could put a big bounty on this question because it's driving me nuts!
Best Answer
If I understand your question correctly, you can do what you want as follows:
I've created a visual diagram of steps 2 - 4 below: