I know Photoshop quite well but there is this one problem i can not seem to solve.
When i use the free transform function and move the two right coners towards eachothe the whole image reacts on it (see: http://student-kmt.hku.nl/~charles/freetransform.jpg). Everything seems to get stretch on the left side and squeezed on the right side. This is cool if you want to make it look 3D as i expect from the perspective transformation but that's not what i want. I want everything to keep its horizontal size and just change the vertical size.
I hope someone understands what i'm trying to explain and hope you can help me solve this problem.