How does Samsung C9pro screen split mode open? Samsung C9pro Split-screen mode open tutorial

1 First click on the home key to the left of the "recent task key", call out the most recent task list, in each program task on the right side of the two box-like screen opening switch, click on this switch. (pictured below)

2) After clicking the switch, this application will be on the phone in the upper half of the display, then you can select the second application by clicking, directly on the task click on it, when the application is finished, the upper and lower part of the display of different applications can also be pulled through the middle of the blue line to adjust the size of each screen. (pictured below)