I hope this is helpful cause i just activated a first time account here to answer your Q. I was just trying figure out the same as you and kept getting the same info over and over. It turns out what you gotta do is go to Tools - > Effects etc. -> Geometry And there you can use the dah dah dah daaha 'MAGNIFICATION' feature.
So I guess we needed to specify Magnification not Zoom? I don't know. And I don't know if there is another way to go about it or not, perhaps some hotkeys or something. I would like to be about to zoom in/out on select areas of the screen like you would in, say a photo editor...anyone know how to do this (if poss.)? If so, lemm kno.
Hope I helped Citizen.
-MTFBWY-