Operation method:
1, ColorOS 7.2 and above: after entering the recent task interface, press and hold the clear button at the bottom to jump to the recent task management interface.
2.ColorOS 7.0 and higher: Click the menu icon ":"in the upper right corner of the application to lock the latest task and manage it in different screens.
Setting method for displaying running memory information in recent task interface:
ColorOS 7 and later: Go to Settings >; Desktop and lock screen (other settings) > recent task management >; Recent tasks display memory information. Just turn on the switch.
This answer applies to all OPPO models.