Outside of putting your screen to sleep via your device’s power button, you can also automatically put the camera/scanner to sleep between scans.
When the scanner is idle for about 15 seconds, the screen will dim and enter Sleep Mode.
You will be given the option to increase the delay for the next time your device enters this mode: 15 sec, 30 sec, 45 sec, or 60 sec..
To leave sleep mode, just tap the center of your screen.
Should you change your mind about the length of delay, you can adjust it at any time.
If you ever want to completely turn off or back on the Sleep Mode function, this can be done from the Settings menu.