Use the Sleep/Wake button to turn on or wake iPod touch, lock it, or turn it off. Locking iPod touch puts the display to sleep, saves the battery, and prevents anything from happening if you touch the screen. You can still listen to music and adjust the volume using the buttons on the side of iPod touch, and receive FaceTime calls, text messages, alarms, notifications, and other updates.
iPod touch locks automatically if you don’t touch the screen for a minute or so. To adjust the timing, go to Settings > Display & Brightness > Auto-Lock.
Turn on iPod touch. Press and hold the Sleep/Wake button until the Apple logo appears.
Turn off iPod touch. Press and hold the Sleep/Wake button until the slider appears, then drag the slider.
Wake iPod touch. Press the Sleep/Wake button. From the wake screen you can check notifications and recent app activity, take photos, and more. For more information, see Lock screen.