How to favorite apps, senders and notifications

You'll see stars in three places, and each does something different.

1. An app, in grouped mode. Favoriting the app keeps all its notifications at the top of History.
2. A sender, in messaging apps. The star next to a sender's name keeps that sender's chats at the top inside that app.
3. A single notification. In the details drawer, the star keeps just that notification at the top.

Steps

1. Open History.
2. Tap the star next to an app or a sender, or open a notification and tap the star in its details.
3. Tap the star again to remove the favorite.