In Windows 10, you can easily adjust window sizes and split windows if necessary.
Some apps that cannot adjust the window size do not support the screen split.
Drag and drop an app to the top end of the screen to change the app to the full screen size.
Drag and drop the app again to a different location to return to its original size.
Drag and drop an app to the right end or left end to reduce the size by half.
The screen is split according to the guideline.
Select a running app displayed in the preview on the split screen.
Drag and drop the app again to a different location to return to its original size.
Drag and drop an app to the left corner to reduce the app to 1/4 size of the screen.
The screen is split according to the guideline.
You can use this method to place up to four apps on the screen.
Drag and drop the app again to a different location to return to its original size.