Setting up new E-PL6

I've never used a screen protector with my smartphones or cameras, I've dropped the former occasionally and I jam the latter willy nilly into bags (where zippers or even the strap are probably the biggest danger)... Never gouged out a distracting scratch on any display. I'll occasionally notice a couple very slight hairline scratches under direct sunlight at just the right angle, but that's about it.

Most displays use reinforced glass if not something more advanced like Corning Gorilla Glass, it actually takes quite a bit to scratch that stuff, even something like an errant key won't easily manage it (I don't keep keys in the same pocket as the phone all the same). The one thing which WILL easily scratch em is fine grain particles, sand, construction dust, etc.

If I worked/played near that often I'd totally be using a screen protector, outside of that I'm not terribly worried about my displays, they feel much better naked than with any protector I've ever touched or tried on other's gear.

As for the levels, on my fairly new (still learning it!) E-M5 II they're in the same place as the live blinkies and CAN be enabled at the same time... It basically gives me three display modes to cycle thru and I can select any combination of levels, blinkies, and histogram for each IIRC... It's a little hidden but pretty intuitive once I found it, the Ok vs right arrow with those settings and others dichotomy still throws me off a little tho.