Google has made changes to the way multiple tasks work on Android P where you previously had to enter the screen splitting mode to keep the application for a long time and then drag it to the top of the screen.
In the new Android P, the multitasking view is reminiscent of webOS days. As a result, enabling screen splitting mode no longer works as it once did. However, it’s still easy to use, whether or not you’re using the new “Swipe up on Home button” gesture or have stuck with the old-style navigation buttons that include the “Recents” aka “Overview” softkey.
Now with Android P you can enter the screen splitting mode by clicking and holding the icon that appears above the thumbnail of the application, then selecting the screen split option, then the application will be sent to the top of the screen and you can choose another application to open it in the bottom half.
To exit the screen splitting mode, just drag the border between the two apps to expand the app you want to keep in full screen, and from the screen splitting mode, you can also click the Home button to close the bottom app and access your other apps.
Because of the popularity of larger Android devices, and the abundance of RAM found on low-end devices, it’s no surprise that Google is focusing on improving multitasking, although the change we see in developer previews is not necessarily greater than any change. Any slight improvement that may improve the multi-tasking experience is great.