When I have a clip in descript and when I make a cut. Then I move the next bit in the frame the first clip seems to be linked and it moves to where I moved the other clip to. How can I unlink the 2 clips so that I can move the other without affecting the first clip? (I have spent about an hour trying to work without any luck!) I want to move the person on the right to the left that is green-screened to the left on the next clip.