How to separate whatsapp's chats notifications on notification bar? (LG G3)

[Michael Burshtein]

In the notification bar it shows all the messages from all chats in 1 notification (Showing the messages and then something like "10 messages from 3 chats").
Sometimes, by accident, I do something that makes all the messages seperate (Each chat is different notification).
How do I do that intentionally?

 

[B. Diddy]

Welcome to Android Central! Usually, you can expand a grouped notification by swiping down slightly over that group notification. Does that do anything?