Focus Peaking (sort of) for Olympus Pens.

I use this when shooting with manual focus lenses.

First I change to RAW + JPEG

I go to the Art filters and select Key Line II

When I focus I see black outline features. As I turn the focus ring the black moves fore and aft. You want the blackest at where you want the focus to be. Use it on the lawn to see how the focus point moves. When you look at preview you will only see the JPEG, not the RAW. When you upload to your computer, the RAW image will appear alongside the Key Line JPEG.

I haven't used this technique while shooting portraits, I still do them the old fashion way.

It seems good for setting the hyperfocal focus point.

http://www.cambridgeincolour.com/tutorials/hyperfocal-distance.htm