I tried googling it but every link I found thinks I mean reversing the playback of the footage, or rotating it upside down. How do I create a 'reverse negative', as it's called in the film world. Not sure what you call it in digital. Thanks.
Do you need to rotate or to flip it?
Flipping: (left stays left)
Select clip in timeline (so you know which clip it is.)
Go to effects window.
Open 'Transform' folder.
Pick up 'Flip Vertical', drag it on clip: et voila! The upsidedownfootage is upsideup again.
(In this folder you'll also find: 'Horizontal Flip' and 'Crop'.)
(When rotating:
Select clip.
Go to properties window.
Open: motion tab.
Change rotation to 180 degrees.)
If rotating is to difficult for you:
Combing a Vertical Flip with a Horizontal Flip is the same as rotating 180 degrees.
(If neither of this works: try to import the clip again while holding the camera upsidedown)
(I'm so happy I can flip the image inside my camera, so it gets recorded the way I need it on the timelineI only used it once, lol)