I've recently puchased a GX7, moving from a GX1 and, before that, a GF1. I'm starting to fine tune the GX7, learning the menu changes from the GX1, etc. My other camera body is a Nikon D610 DSLR, and, as with the Panasonics, I always use aperture priority and shoot RAW and pp in Lightroom. I've been experimenting with the Nikon's improved "auto ISO" with which both the minimum and maximum ISO levels and shutter speeds can be set. The Nikon's recent improvement is that the AUTO ISO system recognizes the focal length of the mounted lens and the auto ISO can be set to adjust the shutter speed to that focal length and 2x and 4x iterations thereof. I've found no very clear instructions in GX7 manual about what, if any, auto ISO features are really available and, if so, how they may be configured, but I seem to have erroneously, inadvertently or simply jumpred to far of myself and set some sort of maximum ISO at ISO 1600. Since then I've read from some posters that with a high "Auto" ISO setting (that info is shown on the back LCD) like my 1600, for example, has "programmed" the GX7 to make images at 1600 whether the shooter has desired that or not and, at the same time, under som conditions, has also set shutter speeds as low as 1/15. What I'd like to do is turn off this so-called auto ISO feature on my GX7 and go back to what's worked well for me with my GX1 and GF1, i.e., simply setting the ISO manually, while making my own judgments about the appropriate aperture (which I almost always have selected, subjected to any depth of field issues I'm facing), and a shutter speed sufficient to stop any action in the planned image. How do I go back to straightforward manual ISO selection?