How to enable the function of "show number of unread messages" on Zenfone

How to enable the function of "show number of unread messages on an app screen's upper right corner"?  

After this function is enabled, the number of unread messages will be shown on an app screen's upper right corner.  Note: This function does not apply to every apps. Please see "Enable list" for detail.

1.  Tap "All apps" on home screen, tap upper-right menu icon, and then tap "Settings".
   
2.  Tap "Enable notification access" and then enable badge app icon.
   
3.  Tap "OK" to enable ASUS Launcher, and then tick apps in the list.
   
4.  Done