How to take screenshot on Oppo K3

Brand: 
Oppo
Model: 
K3
Instructions: 
  • Screenshot * by Buttons 

    First, open the corresponding content on the display *.
    Then press the "On / Off" and "Volume Down" buttons at the same time.
    Keep pressed until a confirmation on the screen or an acoustic signal occurs.
    The screenshot can now be found in the folder of the same name under "Photos".