Two things:
- You have to change your screen layout from a list style layout to a detail style layout. This is how it works on Classic Apps. In New Apps, all screens are detail style layout screens.
- That incarnation of barcode scanning is formally deprecated. You can use it if you currently have it, but you can’t add it.
Barcode scanner removed from glide - #8 by DJP
Also, Classic Apps WILL eventually go away, so don’t put too much effort into building new projects with them.