displaying pictures in em5 evf
As far as I know its' only possible if the automatic eye detection is disabled. Please don't ask me why Oly restricted usage like this ...
Easiest way to switch off the eye detection is by pressing the LCD/EVF switch at the right side of EVF for 3 seconds.
After this you can manually switch to EVF even in "picture playback" mode.
I did not find the two gems "switch off automatic" and "press button for 3 secs" myself, only a forum like this can help to find these kind of hidden features ...