How to enable preview in notifications on an Oppo phone I recently started using an Oppo A77 phone and have no experience with ColorOs. All I am trying to do is to be able to display a preview (sender/subject/body/something) show up on my notification window where Gmails notifications come up. There is no option to select preview messages in the notifications settings. 
This is my notification setting for gmail:



and this is how my gmail notifications come up:



How do I get a preview of my gmail notifications on an oppo A77 ?

This is the exact question asked on other sites and no one seems to know the answer : 


http://www.androidauthority.com/community/threads/how-to-get-expanded-notifications-in-a77.47010/#post-110606
http://community.oppo.com/en/forum.php?mod=viewthread&amp;tid=55040&amp;page=1#pid577510
Screenshot (click to enlarge)

I think I found the answer. I was also looking for the answer because I also wanted to expand my notifications and I tried it and it works.