How can I display the 'settings menu' in the viewfinder on the Olympus OM-D E-M5?

I had this exact problem with the OM-D E-M5 Mk 2. After resigning myself to not being able to change the settings in menu (this meant setting date and time too), I found that if you hold the EVF button (fn3 on Mk 2) (looks like a curved rectangle between two vertical lines) you get an option to change "automatic vf on" to manual. On the manual setting I was able to see the menu.

There should be an evf/lv button near the eye piece.Keep pressing that until the evf lights up. Alternatively you can use a mini hdmi lead and patch it through to a monitor or tv in order to get to the menu options then select evf eye control only.Set up the camera using a monitor.