Yeah, I think elevation only shows when following a course. You can’t just select it as one of the normal data screens. Well, I’ve never found a way, and not sure why it would be useful as it would only display where you’ve been, not where you’re going.
I have a feeling that the elevation display scrolls along as you ride, rather than cramming it into that small screen but you can’t control it.
Living in East Angular, I have little need to bother with the elevation plot so haven’t paid it much attention – the largest climbs I fit in are over humpback bridges…..