Pen E-P5 - How do I show highlights/shadows?

How do I get my new Olympus Pen E-P5 to display the highlights in red & the shadows in blue?

I found the setting briefly, when I first got the camera last month, but quickly lost it again and now can't find it again!

At the time I didn't have a manual, so was just fiddling about, based on what I already knew about my older Nikon & Canon DSLRs. (I especially liked the way the Olympus shows the lost highlights/shadows in 'Live view'.)

I've now downloaded the official manual, and also bought a paper version, and hunted for every reference in the manual to 'highlight', but can't get it back!

I found two possible settings in menu options

Custom/Display/Info Settings/Info/Highlight&Shadow

and

Custom/Display/Info Settings/LV-Info/Highlight&Shadow

one of which looked like it might do it, but setting either of these to 'on' hasn't worked, and I don't know what else to do.

I know somewhere there, but I just can't find it, not even in the manual.

If I get it back, I'd also like to see it in the playback mode too, but one step at a time, I guess!

Thanks for any help,

Andrew