A rule's vehicles and channels

How to

1. On Alert rules, tap New rule. Every kind of alert is in the list, each with its description.
2. Pick the kind, then the vehicles it applies to, or all of them.
3. Pick the channels: app notification, SMS, WhatsApp, email. Only the channels that kind can send are offered.
4. Save. The rule appears under Rule settings and its switch turns on.
5. Edit on a rule changes it; Remove deletes it.