I have come from using Pinnacle Studio that allowed more latitude in panning and zooming by not limiting the zoom to the aspect ratio of the time line.
I realize that Premiere pro does allow this. Is there a plug in that can give you more options. Is there another free program that can be used as a workaround to make pan and zoom segment
None that I'm aware of.
Though I suppose you could create your pan/zoom in Pinnacle's software and output that as a 1920x1080 mp4 and then import that finished video into Premiere Elements as a workaround.