How to hide a group?

Please right click the group and then select Hidden as shown below

If you want it show again, then right click any group and then select Show Hidden Groups.

This article is suitable for EfficientPIM, Efficient Man's /Lady's Organizer, Efficient Reminder, Efficient Address Book, Efficient Notes, Efficient Diary, Efficient Password Manager, Efficient Calendar, Efficient To-Do List, and Efficient Sticky Notes.