There is an option to make kicker required, but the behavior is strange. All of the fields are marked as required in the UI, but you only need to fill in one and only one. That's very confusing for our users, because each kicker is labeled required. It would be much easier if we could make the indiviual kickers required when the kickers are added. You could add a checkbox that says "required." I've included a mockup.
Joseph Kelly
Hi there! We have shipped this functionality as part of the Composer 2.6.1 release. You can now set individual kickers as required in the ANS Meta Field Configuration section in Composer Settings -> Clicking the gear icon in Kickers and Labels to Edit Settings and select which Kickers should or should not be required!