How does Glory v40 lock the application?

When cleaning up background programs, when there are many programs, one-click cleaning will clean up what you want to keep. At this point, we can lock the background application. How does Glory v40 lock the application?

How does Glory v40 lock the application? 1. In the case of using navigation gestures, slide up from the middle area at the bottom of the interface and stay, bring up the background application list, and then drop down the software you want to lock.

2. In the case of using the virtual navigation key, click the box button in the lower left corner to bring up the background application list, and then drop down the software you want to lock.

This paper takes Glory v40 as an example and applies it to Magic UI 4.0 system.