If you use keyframes for the zoom in Premiere Elements you can display a line that shows the scale of the clip over the time (right click on the clip in the timeline, select "Show Clip Keyframes", ...). This is very useful because you can change the bezier handles. There is just one problem:
Let's say you want to zoom from 100% to 120% then the vertical change of the graph in the timeline is so small that it isn't useful at all. How can I change the vertical scaling of the keyframe graph?
I tried to adjust the vertical scale of the clip in the timeline, but it wouldn't scale the graph.