STRAVA Live Segments. How to change which effort I want to compare against? (during activity)

During the activity, when I hit  segment on EDGE 520 I can very easy change effort I want to campare against (KOM, PR, RIVAL). But how to do it on FENIX 5?? I now how to do it when you r "offline" (Activity - Trening - Strava), but how to do it during the activity, when you are already on segment???