I added a lot of loopcuts to a "plane". Then I unwrapped the plane and added an image. But then I realized that the unwrap format does not match the shape of my picture. I tried to scale it by clicking S, but it scales the whole grid. I even tried scaling only to the y axis (S), but then it scales the bottom part of it as well. I only want the scale the top bit to match the picture not the bottom bit. How do I do this?