Open the settings application.
First, click on the Apple 6 screen to open the Settings application.
Find "Display and Brightness"
In the list of settings, find the column "Display and brightness" and click Enter.
Select "standard mode"
Next, under the list of display and brightness, click the column of "Display Mode", and then in the display mode, please select "Standard Mode" and click the "Settings" button. If the current mode is standard mode, no setting is required.
restart
When resetting the display mode, you need to restart the system to adapt, and then click the restart button that pops up at the bottom.
Try the landscape operation.
After the restart, you can try to experience the horizontal screen operation. The home screen supports landscape screen, weather, stock market and other applications. As long as you support landscape application and turn the phone sideways, it will automatically become split screen mode.