Using Pen Window on your Galaxy Tab
Pen window allows you to open multiple applications in specified areas on the screen.
Use Pen Window
Remove the S Pen from the tablet and select Pen Window.
If the S Pen is already removed from your tablet, hover over the tablet with the pen and tap the S Pen button.
Draw a box to your desired size on the screen where you would like application to appear.
Select from the list of applications to view in the smaller window.