You could add products to order list by scanner, after filling in barcode manually or through scanner.
Firstly, select the item you would like to add barcode to edit.
Then, slide page down until you see Barcode.
The product won’t appear in menu list on page menu if visible of attribute was turn off.
Generally, turning off the toggle ‘visible’ after filling in barcode and adding items to order list by scanner will improve the fluency of system.
Please refer to the video below.