The fastest way to schedule against a single contact is from that contact directly, not from the calendar:
- Open the contact’s Profile page, or their WhatsApp Chat conversation.
- Click Reminders & Tasks in the header.
- Click New, choose Reminder, WhatsApp follow-up, or Email follow-up, set the time, fill in the details, and Save.
The contact is filled in for you, and the item still appears on the Scheduler calendar. Full detail: 5.11 Contact Reminders & Follow-up Tasks.
