Since Nokia Lumia 640 XL (640 XL) is a Windows Phone device, you may click a screenshot easily using the following method
For Lumia Devices
- Press and hold Power button and Volume Up button (on some devices: Start button and Power button) for about 2-4 seconds, in order to take screenshot.
- You will hear a camera sound or outline frame to signal the screenshot being taken.
- Release the buttons, then.
- You will hear a click sound and your screenshot would be saved to Album/Screenshots and would be accessible via Photos hub.
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