"Barcode Options" Section allows to set up a barcode scanner input:
Handle as a barcode scanner. If a barcode scanner is selected as an active HID device, Store Manager receives and processes the scanned data in a special way (for example, if the POS window is open - scanning a barcode will automatically add a product to the order).
Handle as a keyboard. Store Manager handle scans as through data came from the keyboard (as if a user typed digits on keyboard and press Enter).
Also, you can select active device at this section to be handled as barcode scanner: