It is unfortunate that the thick manual is full of words, and yet is so poorly ordered that you cannot find anything right away; you have to dig, re-dig...and then, somewhere in there, there's that one sentence buried that hints at an answer.
I found the manual very unhelpful. It is helpful if you don't know a thing about cameras, but if you're not a novice user, it is just a waste of time.
By deduction I figured out that 4:3 actually uses the whole sensor (pointless, though, when shooting RAW...and yet they don't mention that; thank g@wd I knew that) versus the misleading crops they have in the manual.
It took me a few minutes to figure out that "Allow Shutter Release Without Lens", after digging through each menu, was what I was looking for (the sales rep almost had a heart attack, too, until I found that setting).
There are still a bunch of things about the camera that don't make sense and nowhere (and I mean nowhere) in the manual they're addressed.
Like: why is the little wheel with the arrow showing up once I press the shutter button half-way after reviewing the photos? And only then does it show up. Or why does the EV compensation move in Aperture Priority when I move the wheel, instead of the aperture settings? Why can't you get to it easily via the Quick Menu? Why can't you get to it at all via the main Menu? Why does turning off the Display not take hold once you start shooting again?
Love the little camera's images, and the 20mm f/1.7 lens, but the menu design shows the many afterthoughts and big-wig committee "ooh ooh I know what I'd like to see in there and I don't care what your objections are because I sign your checks..."
OK, end of rant.