You get used to it.
It didn't take long to become adept at the difference.
I actually prefer it this way.
You can set the zoom to go to a pre-configured zoom level (almost 1:1) which takes the scrolling out of the equation. At least it does on the 5D Mark III. I'm assuming the 6D's firmware is based on that lineage.
I don't understand why you'd want to assign HDR to a button? Firstly, in-camera HDR saves only to JPG, and, secondly, HDR...
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