I'm new with kdenlive. I've been tinkering and things have slowly been coming along. But, one thing i can not figure out is "how to rotate" my videos. I have recorded them using a digital camera. Some of which have been recorded holding the camera vertically. So you can understand my problem. I just need these video's flipped 90 degrees. So when compiling clips together they are in the order and position they need to be in. Can anyone help me with this? Thank you.

Does the «Rotate and Shear» filter work for you?

The Mirror effect set to "flop" mode will do it.