This is the simplest method to take a screenshot on Galaxy Note 4. You may take screen shot using SPen or just swapping hand over your screen. But this old method works on most Samsung Galaxy devices.
Just press the “Power Button” and “Home Button” at the same time and it will capture the screen.
Capturing screen is particularly useful when you want to show someone your new wallpaper or highest score in a particular game. Here is a simple video which shows you how to capture screenshot on Galaxy Note 4 and how you can then use Spen to do do various things with the captured photo.