GH4 GH5 - Major issues. UGGGG!

Since the purple bars only show up when I iso up can anyone remind me how to change the iso increase in the smaller amounts than 200, 400, 800...
My GH4 does 200, 250, 320, 400, 500, 640... I remember I changed it, but don't remember how.
 
Something about going to stills mode, then diving into the menus and finding the iso steps and changing to 1/3 stop.
 
I had an issue yesterday where after taken some pictures the camera froze for a a minute before I can do anything. I think the processor was doing something and froze. (Felt like a computer lol)
 
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