To take a screenshot on your LG Stylo 4, you can use one of the following methods:

1. Open the notification bar or quick setting bar of your LG Stylo 4 by sliding your finger from the top of the screen down and pressing the “Screenshot” icon.
2. Press and hold the Volume Down and Power button together for two seconds. You should hear a shutter sound on your device and it will show that screenshot is taken. All the screenshots that you take are saved under Gallery > Screenshot folder.
3. Use Power button and Volume down (-) keys simultaneously.
4. Alternatively, you can use the Smart Rear Key, which allows quick capture by just twice touching the fingerprint sensor located at the back of phone.