Overview, a widget for managing different items in one place, puts your Mails, Reminders and Events together in your notification center. With a cleaner and simpler interface, it is more convenient and easier to manage different items with gestures and quick actions, e.g. mark as read/complete or delete.
It also integrates with buttons from Tap to Widgets (required installed) for adding different items (e.g. reminders, events, note) quickly in notification center.
NotificationCenter addons can be configured from the Settings app, in the Notifications panel
Configure options on Settings.