How to set the unread message prompt in the upper right corner of OPPO SMS?

Nowadays, the social attribute of short messages is getting weaker and weaker, the b2c attribute of businesses is getting stronger and stronger, and users pay less attention to the content of short messages, and a large number of new messages bring users a sense of burden. So the number prompt is cancelled, and the number of unread messages is indicated by red dots. At the desktop icon, you can still display the number corner, so you can clearly see how many unread messages there are at present (you can select numbers and dots in Settings-Notification Language Status Bar-Notification Management-Information or not display the desktop corner.