I believe the same rear dial push to toggle magnification between PIP and full screen works for any lens when you are in MF mode. The only difference is that with native Micro Four Thirds AF lenses, you activate the magnification feature by turning the focus ring on the lens (assuming that you have the Menu properly set for AF+MF) and then once the magnified view is active, pushing the rear dial toggles between the PIP and full screen views. You use the same shutter half press maneuver to leave magnified view.
I've only had my GX85 for a few days, but I'm quickly growing to love it. Yes, my dearly departed EM5 II was a sexier piece of of gear and had the feel in hand to match the good looks. But I personally find the form and function of the Panasonic cameras to be superior from an ergonomic standpoint. Yes, the GX85 grip is a slight step back from the GX7, but it is completely fine and comfortable. The EVF is not cutting edge, but again it is completely fine and comfortable (and yes, I do perceive of the rainbow tearing effect and it doesn't really bother me). But overall, the speed and ease with which I can adjust my focus point, my magnified view, the lens FOV setting for the IBIS, etc. are all far superior to my old Olympus.
Thanks to everyone on the forum for sharing your feedback on the GX85. It helped convince me that it was a good move to replace my EM5 II with the GX85 for its run/gun stills/video capabilities. I found a great condition, sub 400 shutter count EM5 Mark I to have my OMD fix (same stills quality for a fraction of the cost).
Hal got a reaction from John Matthews in An adventure into the Panasonic GX85/80 begins - and a look at the Leica Nocticron for Micro Four Thirds